feat(search): deserialize and surface attributes in detail service and OpenSearch indexing (Task 4)

DetailService deserializes attributes JSON from ExecutionRecord/ProcessorRecord and
passes them to ExecutionDetail and ProcessorNode constructors. ExecutionDocument and
ProcessorDoc carry attributes as a JSON string. SearchIndexer passes attributes when
building documents. OpenSearchIndex includes attributes in indexed maps and
deserializes them when constructing ExecutionSummary from search hits.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

cameleer3-server-core/src/main/java/com/cameleer3/server/core/detail/DetailService.java

@@ -2,11 +2,16 @@ package com.cameleer3.server.core.detail;
 
 import com.cameleer3.server.core.storage.ExecutionStore;
 import com.cameleer3.server.core.storage.ExecutionStore.ProcessorRecord;
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
 
 import java.util.*;
 
 public class DetailService {
 
+    private static final ObjectMapper JSON = new ObjectMapper();
+    private static final TypeReference<Map<String, String>> STR_MAP = new TypeReference<>() {};
+
     private final ExecutionStore executionStore;
 
     public DetailService(ExecutionStore executionStore) {
@@ -27,7 +32,8 @@ public class DetailService {
                             exec.errorMessage(), exec.errorStacktrace(),
                             exec.diagramContentHash(), roots,
                             exec.inputBody(), exec.outputBody(),
-                            exec.inputHeaders(), exec.outputHeaders()
+                            exec.inputHeaders(), exec.outputHeaders(),
+                            parseAttributes(exec.attributes())
                     );
                 });
     }
@@ -41,7 +47,8 @@ public class DetailService {
                     p.processorId(), p.processorType(), p.status(),
                     p.startTime(), p.endTime(),
                     p.durationMs() != null ? p.durationMs() : 0L,
-                    p.diagramNodeId(), p.errorMessage(), p.errorStacktrace()
+                    p.diagramNodeId(), p.errorMessage(), p.errorStacktrace(),
+                    parseAttributes(p.attributes())
             ));
         }
 
@@ -61,4 +68,13 @@ public class DetailService {
         }
         return roots;
     }
+
+    private static Map<String, String> parseAttributes(String json) {
+        if (json == null || json.isBlank()) return null;
+        try {
+            return JSON.readValue(json, STR_MAP);
+        } catch (Exception e) {
+            return null;
+        }
+    }
 }

cameleer3-server-core/src/main/java/com/cameleer3/server/core/indexing/SearchIndexer.java

@@ -70,14 +70,16 @@ public class SearchIndexer implements SearchIndexerStats {
                             p.processorId(), p.processorType(), p.status(),
                             p.errorMessage(), p.errorStacktrace(),
                             p.inputBody(), p.outputBody(),
-                            p.inputHeaders(), p.outputHeaders()))
+                            p.inputHeaders(), p.outputHeaders(),
+                            p.attributes()))
                     .toList();
 
             searchIndex.index(new ExecutionDocument(
                     exec.executionId(), exec.routeId(), exec.agentId(), exec.applicationName(),
                     exec.status(), exec.correlationId(), exec.exchangeId(),
                     exec.startTime(), exec.endTime(), exec.durationMs(),
-                    exec.errorMessage(), exec.errorStacktrace(), processorDocs));
+                    exec.errorMessage(), exec.errorStacktrace(), processorDocs,
+                    exec.attributes()));
 
             indexedCount.incrementAndGet();
             lastIndexedAt = Instant.now();

cameleer3-server-core/src/main/java/com/cameleer3/server/core/storage/model/ExecutionDocument.java

@@ -8,12 +8,14 @@ public record ExecutionDocument(
         String status, String correlationId, String exchangeId,
         Instant startTime, Instant endTime, Long durationMs,
         String errorMessage, String errorStacktrace,
-        List<ProcessorDoc> processors
+        List<ProcessorDoc> processors,
+        String attributes
 ) {
     public record ProcessorDoc(
             String processorId, String processorType, String status,
             String errorMessage, String errorStacktrace,
             String inputBody, String outputBody,
-            String inputHeaders, String outputHeaders
+            String inputHeaders, String outputHeaders,
+            String attributes
     ) {}
 }