refactor: collapse Config proxy, migrate tracker to SQLite, split reconcile module

- Config: remove _ConfigAccessor and ConfigManager; use __getattr__ for lazy
  loading on single _Config class; re-register self as _instance in __getattr__
  so reset() always clears the correct object (item 1)
- upload_tracker: replace hand-rolled JSON store with sqlite3; auto-migrates
  existing JSON on first run; remove dead record_frigate_file function;
  connection re-opens when CACHE_DIR changes for test isolation (items 2, 8)
- diversity: move ThreadPoolExecutor import to module level; inject optional
  fetch_fn parameter for testability (items 3, 6)
- pyproject: consolidate 4 variant files into extras (gpu/rocm/intel/cpu);
  update Dockerfile to use --extra flag; delete variant pyproject/lock files;
  uv.lock needs regen with `uv lock` after this change (item 4)
- jobs: extract _build_job helper to separate business logic from terminal I/O;
  auto_configure delegates dedup/selection to _build_job (item 5)
- logging: convert f-string log calls to % interpolation throughout all winnow/
  modules (item 7)
- reconcile: new module with reconcile_frigate_mappings and
  enrich_asset_with_face_data extracted from executor.py (item 9)
- scheduler: print next scheduled run time after startup and after each run;
  fix f-string logger.error call (item 10)

scheduler.py

@@ -30,6 +30,7 @@ def check_models() -> None:
 NOW = time.time()
 cron = croniter(SCHEDULE, NOW)
 next_run = cron.get_next(float)
+print(f"Next run: {time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(next_run))}", flush=True)
 
 while True:
     now = time.time()
@@ -42,7 +43,8 @@ while True:
         except KeyboardInterrupt:
             raise
         except Exception as e:
-            logger.error(f"winnow run failed: {e}", exc_info=True)
+            logger.error("winnow run failed: %s", e, exc_info=True)
             print(f"winnow run failed: {e}", flush=True)
         next_run = cron.get_next(float)
+        print(f"Next run: {time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(next_run))}", flush=True)
     time.sleep(max(1, next_run - time.time()))