Merge upstream/ci_mvp (google maps scrapers) into feature-ci_phase-4-7

Resolve conflicts against the new native google-maps actor + repo-wide
ruff-format pass:
- Keep legacy webcrawler KB indexer + its test deleted (modify/delete).
- test_validators: keep WEBCRAWLER case removed (validator gone).
- test_fetch_resilience: keep platforms.youtube import path (our reorg).
- Relocate google_maps actor + tests scrapers/ -> platforms/ to match the
  reorg convention (youtube already there); rewrite imports + fixture paths.
- Add missing __init__.py across the capabilities/ test subtree so duplicate
  test basenames get unique module paths under importlib mode.

Note: google_maps fixture-backed tests error on ci_mvp too (fixtures/*.json
never committed upstream) - pre-existing, out of scope here.

surfsense_backend/app/utils/validators.py

@@ -44,9 +44,7 @@ def validate_workspace_id(workspace_id: Any) -> int:
     if isinstance(workspace_id, str):
         # Check if it's a valid integer string
         if not workspace_id.strip():
-            raise HTTPException(
-                status_code=400, detail="workspace_id cannot be empty"
-            )
+            raise HTTPException(status_code=400, detail="workspace_id cannot be empty")
 
         # Check for valid integer format (no leading zeros, no decimal points)
         if not re.match(r"^[1-9]\d*$", workspace_id.strip()):