Features:
- Aggregate changelog at minor/major bumps and filter to feat+fix

Fixes:
- Quote git-tag format string so local tag listing works in posix shells
- Use Artifact Registry mirror to avoid Docker Hub rate limits
- Set GIT_DEPTH: 0 in GitLab CI template
- Increase maxBuffer for git log to handle large repositories
- Correct Dockerfile to copy src instead of lib
- ci: Revert to stage-less template that ran successfully for days
- ci: Use implicit .post stage so template works with any consumer stages
- ci: Declare stages:[version] so template works standalone
- ci: Set explicit stage:version on agileflow job
- ci: Install git in node:20-slim for agileflow
- ci: Use fleet registry for agileflow CI image