argocd: add Image Updater for auto-deploy on image push

- Install argocd-image-updater via Helm (wave 1)
- Configure Forgejo registry (anonymous pulls)
- Annotate apps for auto-update: api-gw, portfolio, management-service, queue-crd
- Uses newest-build strategy for commit SHA tags

k8s/infra/argocd-image-updater/values.yaml

@@ -0,0 +1,35 @@
+# ArgoCD Image Updater configuration
+# Watches Forgejo registry and updates ArgoCD Applications with new image tags
+
+config:
+  # Registry configuration - Forgejo allows anonymous pulls
+  registries:
+    - name: forgejo
+      api_url: https://forgejo.riotpiao.com
+      prefix: forgejo.riotpiao.com
+      default: true
+      insecure: false
+
+  # Log level
+  logLevel: debug
+
+  # ArgoCD API server
+  argocd:
+    grpcWeb: true
+    serverAddress: argocd-server.argocd.svc.cluster.local
+    insecure: true
+    plaintext: true
+
+# Extra environment variables
+extraEnv:
+  - name: ARGOCD_GRPC_WEB
+    value: "true"
+
+# Resources
+resources:
+  requests:
+    cpu: 50m
+    memory: 64Mi
+  limits:
+    cpu: 200m
+    memory: 128Mi