feat: add is_replay flag to execution pipeline and UI

Detect replayed exchanges via X-Cameleer-Replay header during ingestion,
persist the flag through PostgreSQL and OpenSearch, and surface it in
the dashboard (amber replay icon) and exchange detail chain view.

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

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

@@ -79,7 +79,7 @@ public class SearchIndexer implements SearchIndexerStats {
                     exec.status(), exec.correlationId(), exec.exchangeId(),
                     exec.startTime(), exec.endTime(), exec.durationMs(),
                     exec.errorMessage(), exec.errorStacktrace(), processorDocs,
-                    exec.attributes(), exec.hasTraceData()));
+                    exec.attributes(), exec.hasTraceData(), exec.isReplay()));
 
             indexedCount.incrementAndGet();
             lastIndexedAt = Instant.now();

cameleer3-server-core/src/main/java/com/cameleer3/server/core/ingestion/IngestionService.java

@@ -102,6 +102,12 @@ public class IngestionService {
 
         boolean hasTraceData = hasAnyTraceData(exec.getProcessors());
 
+        boolean isReplay = false;
+        if (inputSnapshot != null && inputSnapshot.getHeaders() != null) {
+            isReplay = "true".equalsIgnoreCase(
+                    String.valueOf(inputSnapshot.getHeaders().get("X-Cameleer-Replay")));
+        }
+
         return new ExecutionRecord(
                 exec.getExchangeId(), exec.getRouteId(), agentId, applicationName,
                 exec.getStatus() != null ? exec.getStatus().name() : "RUNNING",
@@ -117,7 +123,8 @@ public class IngestionService {
                 exec.getRootCauseType(), exec.getRootCauseMessage(),
                 exec.getTraceId(), exec.getSpanId(),
                 toJsonObject(exec.getProcessors()),
-                hasTraceData
+                hasTraceData,
+                isReplay
         );
     }
 

cameleer3-server-core/src/main/java/com/cameleer3/server/core/search/ExecutionSummary.java

@@ -34,6 +34,7 @@ public record ExecutionSummary(
         String diagramContentHash,
         String highlight,
         Map<String, String> attributes,
-        boolean hasTraceData
+        boolean hasTraceData,
+        boolean isReplay
 ) {
 }

cameleer3-server-core/src/main/java/com/cameleer3/server/core/storage/ExecutionStore.java

@@ -30,7 +30,8 @@ public interface ExecutionStore {
             String rootCauseType, String rootCauseMessage,
             String traceId, String spanId,
             String processorsJson,
-            boolean hasTraceData
+            boolean hasTraceData,
+            boolean isReplay
     ) {}
 
     record ProcessorRecord(

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

@@ -10,7 +10,8 @@ public record ExecutionDocument(
         String errorMessage, String errorStacktrace,
         List<ProcessorDoc> processors,
         String attributes,
-        boolean hasTraceData
+        boolean hasTraceData,
+        boolean isReplay
 ) {
     public record ProcessorDoc(
             String processorId, String processorType, String status,