Merge branch 'pr-1553' into integration/validation-batch

# Conflicts:
#	src/services/worker/session/SessionCompletionHandler.ts

src/services/sqlite/SessionStore.ts

@@ -889,6 +889,16 @@ export class SessionStore {
     `).run(memorySessionId, sessionDbId);
   }
 
+  markSessionCompleted(sessionDbId: number): void {
+    const nowEpoch = Date.now();
+    const nowIso = new Date(nowEpoch).toISOString();
+    this.db.prepare(`
+      UPDATE sdk_sessions
+      SET status = 'completed', completed_at = ?, completed_at_epoch = ?
+      WHERE id = ?
+    `).run(nowIso, nowEpoch, sessionDbId);
+  }
+
   /**
    * Ensures memory_session_id is registered in sdk_sessions before FK-constrained INSERT.
    * This fixes Issue #846 where observations fail after worker restart because the

src/services/worker/http/routes/SessionRoutes.ts

@@ -40,7 +40,8 @@ export class SessionRoutes extends BaseRouteHandler {
     super();
     this.completionHandler = new SessionCompletionHandler(
       sessionManager,
-      eventBroadcaster
+      eventBroadcaster,
+      dbManager.getSessionStore()
     );
   }
 

src/services/worker/session/SessionCompletionHandler.ts

@@ -11,12 +11,14 @@
 
 import { SessionManager } from '../SessionManager.js';
 import { SessionEventBroadcaster } from '../events/SessionEventBroadcaster.js';
+import { SessionStore } from '../../sqlite/SessionStore.js';
 import { logger } from '../../../utils/logger.js';
 
 export class SessionCompletionHandler {
   constructor(
     private sessionManager: SessionManager,
-    private eventBroadcaster: SessionEventBroadcaster
+    private eventBroadcaster: SessionEventBroadcaster,
+    private sessionStore: SessionStore
   ) {}
 
   /**
@@ -24,6 +26,9 @@ export class SessionCompletionHandler {
    * Used by DELETE /api/sessions/:id and POST /api/sessions/:id/complete
    */
   async completeByDbId(sessionDbId: number): Promise<void> {
+    // Persist completion to database before in-memory cleanup (fix for #1532)
+    this.sessionStore.markSessionCompleted(sessionDbId);
+
     // Delete from session manager (aborts SDK agent via SIGTERM)
     await this.sessionManager.deleteSession(sessionDbId);