chore: increase celery soft time limit for chronos ensemble cpu inference

api/celery_app.py

@@ -21,7 +21,7 @@ celery_app.conf.update(
     worker_prefetch_multiplier=1,
     task_acks_late=True,         # Task acknowledged AFTER completion, not pickup
     worker_max_tasks_per_child=50,  # Restart worker process every 50 tasks — prevents memory leaks
-    task_soft_time_limit=300,    # Warn at 5 minutes
-    task_time_limit=600,         # Hard kill at 10 minutes
+    task_soft_time_limit=1200,   # Warn at 20 minutes
+    task_time_limit=1800,        # Hard kill at 30 minutes
     broker_connection_retry_on_startup=True,
 )