v2.1.1

Fixed

• The container installed its dependencies by resolving pyproject.toml
  fresh instead of from the committed, Dependabot-maintained uv.lock.
  pip install . reads only the floor pins, so the image could ship whatever
  had been released that morning -- a dependency set no test had ever run
  against. That is how google-genai 3.0 reached mcp-gemini's production
  with CI green (RT #1564); this repo had the same gap. The builder now
  installs from a uv export of the lock with --no-deps, so the image
  carries exactly what CI tested.