v0.9.16: ruff baseline cleanup (routes.py, test_wfigs.py)

Mechanical lint fixes only — ruff 31 -> 0 across the two files.

- E402 module-import-not-at-top: 15 -> 0 (relocated module-level
  `logger = logging.getLogger(...)` from mid-import to below the import
  block in routes.py; imports now contiguous at top of file)
- F811 redefined-while-unused: 10 -> 0 (removed 10 redundant function-local
  `from central.gui.csrf import reuse_or_generate_pre_auth_csrf` re-imports;
  the module-level import at line 26 is now load-bearing)
- F401 unused-import: 4 -> 0 (routes.py: fastapi.Depends, and
  central.gui.csrf.reuse_or_generate_pre_auth_csrf resolved by the F811 fix;
  test_wfigs.py: sqlite3, central.config_models.RegionConfig)
- E702 multiple-statements-on-one-line-semicolon: 2 -> 0 (split the two
  semicolon-joined statements in _fused_bbox, indentation preserved)

Deliberate function-local wizard imports (circular-import workaround) left
untouched. pytest: 890 passed / 1 skipped, unchanged across 3 runs.

no behavior change; ruff mechanical fixes only.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/test_wfigs.py

@@ -1,13 +1,12 @@
 """Tests for WFIGS adapters."""
 
-import sqlite3
 from datetime import datetime, timezone
 from pathlib import Path
 from unittest.mock import AsyncMock, MagicMock, patch
 
 import pytest
 
-from central.config_models import AdapterConfig, RegionConfig
+from central.config_models import AdapterConfig
 from central.models import Event, Geo