bdb7a3139d
First lift in the new PR5 discovery-workers series. Pulls the 448-line playlist sync background worker out of `web_server.py` into its own focused module under `core/discovery/`. Pure 1:1 lift — wrappers keep the original entry-point name so the four callers (`sync_executor.submit(_run_sync_task, ...)`) continue to work without changes. What the sync worker does: 1. Convert frontend JSON tracks → SpotifyTrack/SpotifyPlaylist objects. 2. Normalize artist/album shapes for downstream wishlist parity. 3. Wire a progress_callback that updates `sync_states` + automation card. 4. Patch sync_service for database-only fallback when no media server is connected. 5. `run_async(sync_service.sync_playlist(...))` and capture the result. 6. Update sync_states to 'finished', push playlist poster image to Plex / Jellyfin / Emby, record sync history (with re-sync vs new-sync branching), emit `playlist_synced` event for automation engine, and persist sync status with a tracks_hash for smart-skip on the next scheduled sync. 7. On exception → mark error in sync_states + automation; finally clear progress callback + drop `_original_tracks_map` from sync_service. Dependencies injected via `SyncDeps` (11 fields) — config_manager, sync_service, plex_client, jellyfin_client, automation_engine, run_async, record_sync_history_start, update_automation_progress, update_and_save_sync_status, sync_states dict, sync_lock. The only structural drift from a pure paste is the top-of-function variable binding: original used `global sync_states, sync_service`, lifted version rebinds them as locals from deps (`sync_states = deps.sync_states` etc.) since the names aren't module-level in the new file. Same behaviour otherwise — diff against the original after `deps.X` → global X normalization is **zero differences**. Tests: 18 new under tests/discovery/test_discovery_sync.py covering sync history recording (new + resync), setup error path (with and without automation_id), missing sync_service handling, sync_playlist exception handling, successful sync state transition, unmatched-tracks summary, playlist image upload (plex + jellyfin + zero-synced gate), automation engine emit, automation progress finished call, sync history DB persistence (completion + match_details), tracks_hash persistence, and finally-block cleanup (callback clear + map drop). Full suite: 1068 passing (was 1050). Ruff clean. Kicks off the PR5 series — 9 discovery workers totaling ~2,400 lines across `_run_sync_task`, `_run_*_discovery_worker` family, `_run_quality_scanner`, and `_process_watchlist_scan_automatically`. Wishlist-related extractions deliberately skipped to avoid overlap with kettui's planned `core/wishlist/` package.
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Python
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Python