- 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.
kmsvc-manage, kmsvc-cli require Go 1.26.0 in go.mod but runner was
using golang:1.25-bookworm container. Update to golang:1.26-bookworm
to match project requirements.