feat(phase-18): add in-app notification system (T-128, T-129)

backend/app/jobs/mitre_sync_job.py

@@ -17,6 +17,7 @@ from apscheduler.schedulers.background import BackgroundScheduler
 from app.database import SessionLocal
 from app.services.mitre_sync_service import sync_mitre
 from app.services.intel_service import scan_intel
+from app.services.notification_service import cleanup_old_notifications
 
 logger = logging.getLogger(__name__)
 
@@ -45,6 +46,19 @@ def _run_mitre_sync() -> None:
         db.close()
 
 
+def _run_notification_cleanup() -> None:
+    """Clean up old read notifications."""
+    logger.info("Scheduled notification cleanup job starting...")
+    db = SessionLocal()
+    try:
+        deleted = cleanup_old_notifications(db, days=90)
+        logger.info("Notification cleanup finished — deleted %d old notifications", deleted)
+    except Exception:
+        logger.exception("Notification cleanup job failed")
+    finally:
+        db.close()
+
+
 def _run_intel_scan() -> None:
     """Execute an intel scan inside its own DB session."""
     logger.info("Scheduled intel scan job starting...")
@@ -89,5 +103,13 @@ def start_scheduler() -> None:
         name="Intel scan (every 7d)",
         replace_existing=True,
     )
+    scheduler.add_job(
+        _run_notification_cleanup,
+        trigger="interval",
+        hours=24,
+        id="notification_cleanup",
+        name="Notification cleanup (daily)",
+        replace_existing=True,
+    )
     scheduler.start()
-    logger.info("Background scheduler started — mitre_sync (24h), intel_scan (7d)")
+    logger.info("Background scheduler started — mitre_sync (24h), intel_scan (7d), notification_cleanup (24h)")