US07-03: Harden Media and Metadata Edge Cases

photo_pipeline/api/app.py

@@ -41,6 +41,7 @@ import photo_pipeline.jobs.domain_handlers  # noqa: F401
 from photo_pipeline.config import Config
 from photo_pipeline.db import create_db_engine, create_session_factory, run_migrations
 from photo_pipeline.logging import configure_logging
+from photo_pipeline.services.thumbnails import ThumbnailService
 from photo_pipeline.services.upload_batches import UploadBatchService
 
 FRONTEND_DIR = Path(__file__).resolve().parents[2] / "frontend"
@@ -96,6 +97,9 @@ def create_app(config: Config | None = None) -> FastAPI:
         # An upload whose process died left no outcome behind; resolve it now so the
         # uploader lane is free and the uncertain batch is visible (US05-02).
         UploadBatchService(app.state.session_factory, config=config).recover()
+        # A render killed mid-write leaves its temporary beside the cache entry;
+        # remove those recognized leftovers, and only those (US07-03).
+        ThumbnailService(app.state.session_factory, config).cleanup_temp_files()
         try:
             yield
         finally: