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)

advanced.py

@@ -208,7 +208,7 @@ class PryAdvanced:
             "from",
             "they",
         }
-        freq = {}
+        freq: dict[str, int] = {}
         for w in words:
             if w not in stop_words:
                 freq[w] = freq.get(w, 0) + 1