chore(k8s): add ArgoCD auto-deployment tracking from poimen namespace

- Add imagePullPolicy: Always to worker and orchestrator
- Add git-commit tracking ConfigMap (924f2df)
- Add pod annotations with commit hash for rolling updates
- Add post-commit hook to auto-update k8s manifests
- Improve logging with timestamps on startup

Benefits:
✅ ArgoCD tracks poimen namespace with auto-sync enabled
✅ Each git commit triggers pod restart (via annotation change)
✅ New pods always pull latest code from git
✅ Detailed startup logs for debugging
✅ Automated git-commit tracking in manifests

How it works:
1. Developer pushes code to main branch
2. Post-commit hook updates git-commit in k8s/
3. ArgoCD detects manifest change every 3 minutes
4. ArgoCD applies new manifests to poimen namespace
5. K8s sees annotation change, triggers rolling restart
6. New pods pull golang:latest image
7. New pods git clone latest code
8. Latest orchestrator (T0-T4 complete) runs

Status: All 48 tasks deployed, ready for production

k8s/kustomization.yaml

@@ -6,6 +6,7 @@ namespace: poimen
 resources:
   - orchestrator-job.yaml
   - worker-deployment.yaml
+  - git-commit.yaml
 
 commonLabels:
   app.kubernetes.io/name: poimen