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>
Covers architecture overview, Gitea container registry setup, branching
strategy, and deployment workflow. Sections not yet implemented are marked
with TODO to be filled in as the deployment epic progresses.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
