- Split workflows: CI (lint/validate) and Docker (dev builds)
- Add release.yml for versioned releases with manual trigger
- Release workflow creates release/<version> branches, updates version.py, builds Docker images with SemVer tags, and creates GitHub releases
- Docker images tagged as major.minor.patch, major.minor, major, latest for stable releases
- Pre-release versions tagged with exact version only
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Co-Authored-By: Claude <noreply@anthropic.com>