Update epic checklist, mark completed tasks, fix Gitea username/domain
references, and update DEPLOYMENT.md with correct registry paths.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Deploy script builds and pushes images to Gitea registry, then triggers
Portainer stack redeployment via API. Includes preflight checks for
branch and uncommitted changes. Also renames prod DB volume to avoid
conflicts with dev and changes frontend port to 9080.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>