The build job runs docker on the runner host's daemon, so every run left
two tagged images behind for good. Remove this run's tags once they are
pushed and cap BuildKit's cache at 5 GB, always, never failing the job.
The deploy drops the dangling image its pull replaced on the rgcom host.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01E14m6SuuY6i1vASFeGDBeY