- Fix template to use .Values.gc.schedule instead of hardcoded cron
- Change schedule from daily 03:00 UTC to every 30 minutes
- Prevents DinD PVC fill-up (was at 93% before manual prune)
- Add gc-cronjob.yaml: daily prune of DinD Docker images/volumes/build-cache
and actcache across all forgejo-runner pods. Keeps :latest tagged images,
deletes non-latest older than 72h.
- Expand runner reg PVCs from 1Gi to 20Gi (all three runners) to prevent
action tool cache from filling disk.
- Rust runner gets explicit 20Gi persistence override.
- GC only renders from golang (default) values to avoid duplicate resources.