Merge branch 'dev' into chore/code-hygiene

backend/app/downloads/service.py

@@ -60,6 +60,14 @@ def get_or_create_asset(
     )
     asset = db.execute(stmt).scalar_one_or_none()
     if asset is not None:
+        # A previously-FAILED shared asset must be re-attempted for the new job about to hold it —
+        # reset it to pending (+clear the error) so the worker actually re-downloads instead of
+        # short-circuiting the new job with the asset's stale error. (Mirrors resume_download; without
+        # this a fresh enqueue of a once-failed (source,format) pair is permanently poisoned, since
+        # errored assets carry no expires_at and GC never clears them.)
+        if asset.status == "error":
+            asset.status = "pending"
+            asset.error = None
         return asset
     asset = MediaAsset(
         source_kind=source_kind,