## Summary
- Add `containers/tempo/Dockerfile` — two-stage Go build from forge mirror, modeled on loki
- Switch kustomization from upstream `grafana/tempo` to `registry.ops.eblu.me/blumeops/tempo`
- Bump Tempo 2.10.1 → 2.10.3
## Test plan
- [ ] Kick off container build via `mise run container-build-and-release tempo`
- [ ] Update kustomization `newTag` with built image tag
- [ ] Deploy from branch: `argocd app set tempo --revision local-tempo-container && argocd app sync tempo`
- [ ] Verify Tempo health: `curl tempo.ops.eblu.me/ready`
- [ ] Verify traces flowing in Grafana Tempo datasource
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Reviewed-on: #323
