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)

Dockerfile

@@ -41,18 +41,17 @@ RUN curl -LsSf https://astral.sh/uv/install.sh | sh \
 
 WORKDIR /app
 
-# Swap in the variant-specific pyproject and lockfile before syncing.
-COPY pyproject.toml uv.lock pyproject-cpu.toml uv-cpu.lock \
-     pyproject-rocm.toml uv-rocm.lock pyproject-intel.toml uv-intel.lock ./
+COPY pyproject.toml uv.lock ./
 RUN if [ "$VARIANT" = "cpu" ]; then \
-        cp pyproject-cpu.toml pyproject.toml && cp uv-cpu.lock uv.lock; \
+        uv sync --frozen --no-dev --extra cpu; \
     elif [ "$VARIANT" = "rocm" ]; then \
-        cp pyproject-rocm.toml pyproject.toml && cp uv-rocm.lock uv.lock; \
+        uv sync --frozen --no-dev --extra rocm; \
     elif [ "$VARIANT" = "intel" ]; then \
-        cp pyproject-intel.toml pyproject.toml && cp uv-intel.lock uv.lock; \
+        uv sync --frozen --no-dev --extra intel; \
+    else \
+        uv sync --frozen --no-dev --extra gpu; \
     fi && \
-    uv sync --frozen --no-dev \
-    && uv cache clean
+    uv cache clean
 
 COPY winnow/ winnow/
 COPY entrypoint.sh scheduler.py ./