feat(pry): production readiness pass — apify actor, async db, retry wiring, tests, observability, mypy

- Pin Dockerfile --workers 1

- Wire retry.py + circuit breakers into ultimate_scraper tiers

- Add Apify actor (apify_actor.py, Dockerfile.apify, .actor/actor.json)

- Add async SQLAlchemy support alongside sync db.py

- Add 31 HTTP integration tests (tests/test_api_integration.py + test_api_mcp.py)

- Add OTLP exporter support in observability.py

- Re-enable mypy var-annotated error code; fix annotations

- Improve CI workflow (pip cache, install -e .[dev], gitleaks, commitlint, 40% coverage gate)

scraper.py

@@ -506,7 +506,9 @@ class PryScraper:
         opts = options or {}
         max_pages = opts.get("max_pages", 10)
         max_depth = opts.get("max_depth", 2)
-        visited, to_visit, results = set(), [(url, 0)], []
+        visited: set[str] = set()
+        to_visit: list[tuple[str, int]] = [(url, 0)]
+        results: list[Any] = []
 
         while to_visit and len(visited) < max_pages:
             current_url, depth = to_visit.pop(0)