refactor: rename group/groupName to application/applicationName

The execution-related "group" concept actually represents the
application name. Rename all Java fields, API parameters, and frontend
types from groupName→applicationName and group→application for clarity.

- Java records: ExecutionSummary, ExecutionDetail, ExecutionDocument,
  ExecutionRecord, ProcessorRecord
- API params: SearchRequest.group→application, SearchController
  @RequestParam group→application
- Services: IngestionService, DetailService, SearchIndexer, StatsStore
- Frontend: schema.d.ts, Dashboard, ExchangeDetail, RouteDetail,
  executions query hooks

Database column names (group_name) and OpenSearch field names are
unchanged — only the API-facing Java/TS field names are renamed.

RBAC group references (groups table, GroupRepository, GroupsTab) are
a separate domain concept and are NOT affected by this change.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

cameleer3-server-app/src/main/java/com/cameleer3/server/app/controller/ExecutionController.java

@@ -53,11 +53,11 @@ public class ExecutionController {
     @ApiResponse(responseCode = "202", description = "Data accepted for processing")
     public ResponseEntity<Void> ingestExecutions(@RequestBody String body) throws JsonProcessingException {
         String agentId = extractAgentId();
-        String groupName = resolveGroupName(agentId);
+        String applicationName = resolveApplicationName(agentId);
         List<RouteExecution> executions = parsePayload(body);
 
         for (RouteExecution execution : executions) {
-            ingestionService.ingestExecution(agentId, groupName, execution);
+            ingestionService.ingestExecution(agentId, applicationName, execution);
         }
 
         return ResponseEntity.accepted().build();
@@ -68,7 +68,7 @@ public class ExecutionController {
         return auth != null ? auth.getName() : "";
     }
 
-    private String resolveGroupName(String agentId) {
+    private String resolveApplicationName(String agentId) {
         AgentInfo agent = registryService.findById(agentId);
         return agent != null ? agent.group() : "";
     }

cameleer3-server-app/src/main/java/com/cameleer3/server/app/controller/RouteMetricsController.java

@@ -65,7 +65,7 @@ public class RouteMetricsController {
         List<RouteKey> routeKeys = new ArrayList<>();
 
         List<RouteMetrics> metrics = jdbc.query(sql.toString(), (rs, rowNum) -> {
-            String groupName = rs.getString("group_name");
+            String applicationName = rs.getString("group_name");
             String routeId = rs.getString("route_id");
             long total = rs.getLong("total");
             long failed = rs.getLong("failed");
@@ -76,8 +76,8 @@ public class RouteMetricsController {
             double errorRate = total > 0 ? (double) failed / total : 0.0;
             double tps = windowSeconds > 0 ? (double) total / windowSeconds : 0.0;
 
-            routeKeys.add(new RouteKey(groupName, routeId));
-            return new RouteMetrics(routeId, groupName, total, successRate,
+            routeKeys.add(new RouteKey(applicationName, routeId));
+            return new RouteMetrics(routeId, applicationName, total, successRate,
                     avgDur, p99Dur, errorRate, tps, List.of());
         }, params.toArray());
 

cameleer3-server-app/src/main/java/com/cameleer3/server/app/controller/SearchController.java

@@ -51,13 +51,13 @@ public class SearchController {
             @RequestParam(required = false) String routeId,
             @RequestParam(required = false) String agentId,
             @RequestParam(required = false) String processorType,
-            @RequestParam(required = false) String group,
+            @RequestParam(required = false) String application,
             @RequestParam(defaultValue = "0") int offset,
             @RequestParam(defaultValue = "50") int limit,
             @RequestParam(required = false) String sortField,
             @RequestParam(required = false) String sortDir) {
 
-        List<String> agentIds = resolveGroupToAgentIds(group);
+        List<String> agentIds = resolveApplicationToAgentIds(application);
 
         SearchRequest request = new SearchRequest(
                 status, timeFrom, timeTo,
@@ -65,7 +65,7 @@ public class SearchController {
                 correlationId,
                 text, null, null, null,
                 routeId, agentId, processorType,
-                group, agentIds,
+                application, agentIds,
                 offset, limit,
                 sortField, sortDir
         );
@@ -77,11 +77,11 @@ public class SearchController {
     @Operation(summary = "Advanced search with all filters")
     public ResponseEntity<SearchResult<ExecutionSummary>> searchPost(
             @RequestBody SearchRequest request) {
-        // Resolve group to agentIds if group is specified but agentIds is not
+        // Resolve application to agentIds if application is specified but agentIds is not
         SearchRequest resolved = request;
-        if (request.group() != null && !request.group().isBlank()
+        if (request.application() != null && !request.application().isBlank()
                 && (request.agentIds() == null || request.agentIds().isEmpty())) {
-            resolved = request.withAgentIds(resolveGroupToAgentIds(request.group()));
+            resolved = request.withAgentIds(resolveApplicationToAgentIds(request.application()));
         }
         return ResponseEntity.ok(searchService.search(resolved));
     }
@@ -92,9 +92,9 @@ public class SearchController {
             @RequestParam Instant from,
             @RequestParam(required = false) Instant to,
             @RequestParam(required = false) String routeId,
-            @RequestParam(required = false) String group) {
+            @RequestParam(required = false) String application) {
         Instant end = to != null ? to : Instant.now();
-        List<String> agentIds = resolveGroupToAgentIds(group);
+        List<String> agentIds = resolveApplicationToAgentIds(application);
         if (routeId == null && agentIds == null) {
             return ResponseEntity.ok(searchService.stats(from, end));
         }
@@ -108,9 +108,9 @@ public class SearchController {
             @RequestParam(required = false) Instant to,
             @RequestParam(defaultValue = "24") int buckets,
             @RequestParam(required = false) String routeId,
-            @RequestParam(required = false) String group) {
+            @RequestParam(required = false) String application) {
         Instant end = to != null ? to : Instant.now();
-        List<String> agentIds = resolveGroupToAgentIds(group);
+        List<String> agentIds = resolveApplicationToAgentIds(application);
         if (routeId == null && agentIds == null) {
             return ResponseEntity.ok(searchService.timeseries(from, end, buckets));
         }
@@ -118,14 +118,14 @@ public class SearchController {
     }
 
     /**
-     * Resolve an application group name to agent IDs.
-     * Returns null if group is null/blank (no filtering).
+     * Resolve an application name to agent IDs.
+     * Returns null if application is null/blank (no filtering).
      */
-    private List<String> resolveGroupToAgentIds(String group) {
-        if (group == null || group.isBlank()) {
+    private List<String> resolveApplicationToAgentIds(String application) {
+        if (application == null || application.isBlank()) {
             return null;
         }
-        return registryService.findByGroup(group).stream()
+        return registryService.findByGroup(application).stream()
                 .map(AgentInfo::id)
                 .toList();
     }

cameleer3-server-app/src/main/java/com/cameleer3/server/app/search/OpenSearchIndex.java

@@ -288,7 +288,7 @@ public class OpenSearchIndex implements SearchIndex {
         map.put("execution_id", doc.executionId());
         map.put("route_id", doc.routeId());
         map.put("agent_id", doc.agentId());
-        map.put("group_name", doc.groupName());
+        map.put("group_name", doc.applicationName());
         map.put("status", doc.status());
         map.put("correlation_id", doc.correlationId());
         map.put("exchange_id", doc.exchangeId());

cameleer3-server-app/src/main/java/com/cameleer3/server/app/storage/PostgresExecutionStore.java

@@ -45,7 +45,7 @@ public class PostgresExecutionStore implements ExecutionStore {
                     updated_at = now()
                 """,
                 execution.executionId(), execution.routeId(), execution.agentId(),
-                execution.groupName(), execution.status(), execution.correlationId(),
+                execution.applicationName(), execution.status(), execution.correlationId(),
                 execution.exchangeId(),
                 Timestamp.from(execution.startTime()),
                 execution.endTime() != null ? Timestamp.from(execution.endTime()) : null,
@@ -55,7 +55,7 @@ public class PostgresExecutionStore implements ExecutionStore {
 
     @Override
     public void upsertProcessors(String executionId, Instant startTime,
-                                  String groupName, String routeId,
+                                  String applicationName, String routeId,
                                   List<ProcessorRecord> processors) {
         jdbc.batchUpdate("""
                 INSERT INTO processor_executions (execution_id, processor_id, processor_type,
@@ -76,7 +76,7 @@ public class PostgresExecutionStore implements ExecutionStore {
                 """,
                 processors.stream().map(p -> new Object[]{
                         p.executionId(), p.processorId(), p.processorType(),
-                        p.diagramNodeId(), p.groupName(), p.routeId(),
+                        p.diagramNodeId(), p.applicationName(), p.routeId(),
                         p.depth(), p.parentProcessorId(), p.status(),
                         Timestamp.from(p.startTime()),
                         p.endTime() != null ? Timestamp.from(p.endTime()) : null,

cameleer3-server-app/src/main/java/com/cameleer3/server/app/storage/PostgresStatsStore.java

@@ -29,9 +29,9 @@ public class PostgresStatsStore implements StatsStore {
     }
 
     @Override
-    public ExecutionStats statsForApp(Instant from, Instant to, String groupName) {
+    public ExecutionStats statsForApp(Instant from, Instant to, String applicationName) {
         return queryStats("stats_1m_app", from, to, List.of(
-                new Filter("group_name", groupName)));
+                new Filter("group_name", applicationName)));
     }
 
     @Override
@@ -56,9 +56,9 @@ public class PostgresStatsStore implements StatsStore {
     }
 
     @Override
-    public StatsTimeseries timeseriesForApp(Instant from, Instant to, int bucketCount, String groupName) {
+    public StatsTimeseries timeseriesForApp(Instant from, Instant to, int bucketCount, String applicationName) {
         return queryTimeseries("stats_1m_app", from, to, bucketCount, List.of(
-                new Filter("group_name", groupName)), true);
+                new Filter("group_name", applicationName)), true);
     }
 
     @Override

cameleer3-server-app/src/test/java/com/cameleer3/server/app/storage/PostgresStatsStoreIT.java

@@ -54,10 +54,10 @@ class PostgresStatsStoreIT extends AbstractPostgresIT {
         assertFalse(ts.buckets().isEmpty());
     }
 
-    private void insertExecution(String id, String routeId, String groupName,
+    private void insertExecution(String id, String routeId, String applicationName,
                                   String status, Instant startTime, long durationMs) {
         executionStore.upsert(new ExecutionRecord(
-                id, routeId, "agent-1", groupName, status, null, null,
+                id, routeId, "agent-1", applicationName, status, null, null,
                 startTime, startTime.plusMillis(durationMs), durationMs,
                 status.equals("FAILED") ? "error" : null, null, null));
     }