feat(nowchess): add Kargo project, Rollouts deployment, and secrets

- 9 Kargo Warehouses (one per microservice), staging + prod stages
- PromotionTask: clone GitOps, kustomize-set-image, Gitea PR, ArgoCD sync
- BlueGreen Rollouts for all 9 services with health probes and envFrom
- staging,deployed / production,deployed Quarkus multi-profile support
- CORS_ORIGINS and QUARKUS_PROFILE injected via nowchess-env-config ConfigMap
- Plain K8s Secrets with empty values in secrets/nowchess/ (staging, prod, kargo)
- ArgoCD Applications for kargo project, staging, and prod deployments

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

eu-central-1/argo-apps/nowchess/nowchess.yaml

@@ -0,0 +1,19 @@
+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: nowchess
+  namespace: argocd
+spec:
+  project: default
+  destination:
+    namespace: nowchess
+    server: https://kubernetes.default.svc
+  sources:
+    - repoURL: git@git.janis-eccarius.de:NowChess/Gitops.git
+      path: ./nowchess/eu-central-1-prod
+      ref: values
+      targetRevision: main
+  syncPolicy:
+    automated:
+      prune: true
+      selfHeal: true