Bundle the remaining backend touch-ups that the production review
landed individually as small surgical edits across many modules:
- MQTT runtime: fire-and-forget task tracking + drain resilience.
- mqtt_source + store + storage/color_strip_source: secret_box
encryption for credentials with auto-migration of plaintext fields.
- devices/discovery_watcher: task tracking on watcher start/stop.
- devices/wled_client + wled_provider: URL scheme inference helper
applied at the create/update boundary so bare hostnames stay valid.
- core/capture/screen_capture: hardened error paths.
- core/processing (mapped/processed/processor_manager/video/wled_target):
smaller follow-throughs from the registry refactor that landed
earlier on the branch.
- utils/safe_source + utils/file_ops + utils/__init__: shared URL +
IP classification helpers + larger streaming upload size caps.
- api/auth: WebSocket Origin allow-list + /docs auth-gate.
- api/dependencies: register the new HTTP-endpoint store.
- api/routes (assets, backup, webhooks): streaming-upload caps +
asyncio.gather return_exceptions on broadcast loops.
- tests/test_api + tests/e2e/test_backup_flow: cover the new caps and
the Origin allow-list.
alexei.dolgolyov
898912f8b1