feat: improve generation analytics and maintenance

backend/app/tasks/audio_cache.py

@@ -0,0 +1,29 @@
+"""Celery tasks for story audio cache maintenance."""
+
+import asyncio
+
+from app.core.celery_app import celery_app
+from app.core.logging import get_logger
+from app.db.database import _get_session_factory
+from app.services.story_service import prune_story_audio_cache
+
+logger = get_logger(__name__)
+
+
+@celery_app.task
+def prune_story_audio_cache_task():
+    """Daily task to prune expired story audio cache files."""
+    logger.info("prune_story_audio_cache_task_started")
+
+    async def _run():
+        session_factory = _get_session_factory()
+        async with session_factory() as session:
+            return await prune_story_audio_cache(session)
+
+    try:
+        result = asyncio.run(_run())
+        logger.info("prune_story_audio_cache_task_completed", **result)
+        return result
+    except Exception as exc:
+        logger.error("prune_story_audio_cache_task_failed", error=str(exc))
+        raise