harden: cache PG/Redis singletons, safe orphan-lock cleanup, ScraperAbortedError on lock loss

iaai_scraper/worker/celery_app.py

@@ -27,6 +27,12 @@ def _on_worker_process_init(**kwargs):
     level = settings.log_level if settings.log_level else "INFO"
     setup_logging(level, None)
 
+    # Сбрасываем cached engine/redis после fork — иначе child наследует
+    # коннекты родителя, что небезопасно (особенно с psycopg2).
+    from . import tasks as _tasks
+    _tasks._CACHED_PERSISTENCE = None
+    _tasks._CACHED_REDIS = None
+
 
 def _broker_url() -> str:
     return settings.celery.broker_url or settings.redis.url
@@ -66,15 +72,17 @@ celery_app.conf.update(
     task_acks_late=True,
     task_reject_on_worker_lost=True,
     task_track_started=True,
+    task_ignore_result=True,
     worker_concurrency=settings.celery.worker_concurrency,
     worker_max_tasks_per_child=settings.celery.worker_max_tasks_per_child,
+    worker_max_memory_per_child=settings.celery.worker_max_memory_per_child_kb,
     worker_pool="prefork",
     worker_prefetch_multiplier=1,
     broker_connection_retry_on_startup=True,
     broker_transport_options={
         "visibility_timeout": settings.celery.broker_visibility_timeout,
     },
-    result_expires=86400,
+    result_expires=3600,
     worker_redirect_stdouts=False,
     worker_hijack_root_logger=False,
     beat_schedule={
@@ -107,7 +115,10 @@ def _on_worker_ready(**kwargs):
             health_check_interval=settings.redis.health_check_interval_seconds,
             retry_on_timeout=True,
         )
-        should_dispatch = bool(redis_client.set(STARTUP_SYNC_DISPATCH_KEY, "1", nx=True, ex=600))
+        # Дедуп TTL = интервал beat (по умолчанию 1ч), чтобы не плодить дубликаты
+        # при flapping-рестартах контейнера.
+        dedupe_ttl = max(600, settings.celery.beat_sync_interval_minutes * 60)
+        should_dispatch = bool(redis_client.set(STARTUP_SYNC_DISPATCH_KEY, "1", nx=True, ex=dedupe_ttl))
     except Exception:
         logger.warning("Worker ready startup sync dedupe check failed; skipping immediate dispatch", exc_info=True)
         return