feat(argocd): add prowlarr app (custom chart via Git path)

Uses multi-source Application: chart path "prowlarr/" + values from this repo at "helm-values/prowlarr_values.yml".\nPreserves existing ports, PVCs, and mounts.\n\nCommitted via Codex CLI.

applications/prowlarr.yaml

@@ -0,0 +1,30 @@
+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: prowlarr
+  namespace: argocd
+spec:
+  project: default
+  sources:
+    - repoURL: http://gitea-http.gitea.svc.cluster.local:3000/admin/turingpi.git
+      targetRevision: HEAD
+      path: prowlarr
+      ref: charts
+      helm:
+        releaseName: prowlarr
+        valueFiles:
+          - $values/helm-values/prowlarr_values.yml
+    - repoURL: http://gitea-http.gitea.svc.cluster.local:3000/admin/turingpi.git
+      targetRevision: HEAD
+      ref: values
+  destination:
+    server: https://kubernetes.default.svc
+    namespace: default
+  syncPolicy:
+    automated:
+      prune: true
+      selfHeal: true
+    syncOptions:
+    - CreateNamespace=true
+    - ServerSideApply=true
+