v1.1.0

v1.1.0 release.\n\nKey changes:\n- TSFM required by default (TSFMPolicy.mode='required').\n- CI gates now include TSFM policy matrix and real non-mock TSFM smoke test.\n- Artifact lifecycle APIs and compatibility checks hardened.\n\nSee docs/RELEASE_V1_1.md for migration guidance and release checklist.