feat(argocd): let ArgoCD reconcile azhi-infra from its private GitHub repo

The homelab AppProject allowlist had no azhi repository, so an Application
pointing at ToyoGlobal/azhi-infra fails admission with 'repository not
permitted'. Adding the URL is the whole gate.

The Application itself targets the repository default branch
(harness/staging-slice), not main, and path k8s/overlays/azi-riotpiao. That
overlay renders postgres and the API into namespace azi-riotpiao.

The two Secrets the namespace needs stay out of Git: acr-pull carries the ACR
pull credential and azhi-riotpiao-app-env carries the database credentials,
the JWT secrets and the AES key.

k8s/argocd/apps/72-azhi-riotpiao.yaml

@@ -0,0 +1,36 @@
+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: azhi-riotpiao
+  namespace: argocd
+  annotations:
+    argocd.argoproj.io/sync-wave: '8'
+spec:
+  project: homelab
+  source:
+    # Private GitHub. The read-only credential is Secret azhi-infra-github in
+    # namespace argocd, created out-of-band.
+    repoURL: https://github.com/ToyoGlobal/azhi-infra.git
+    # The repository's default branch. It is not `main`: this repo's work
+    # happens on the staging slice branch, and `main` is behind it.
+    targetRevision: harness/staging-slice
+    # One directory, because ArgoCD reads a single path per source. That
+    # directory is a root kustomization over foundation, postgres and
+    # azhi-server.
+    path: k8s/overlays/azi-riotpiao
+  destination:
+    server: https://kubernetes.default.svc
+    namespace: azi-riotpiao
+  syncPolicy:
+    automated:
+      prune: true
+      selfHeal: true
+    syncOptions:
+    - CreateNamespace=true
+    # The two Secrets this namespace needs are credentials, so they are created
+    # by hand and NOT by this Application:
+    #   acr-pull                 — the private Alibaba ACR pull credential
+    #   azhi-riotpiao-app-env    — DB credentials, JWT secrets, AES key
+    # A missing imagePullSecret fails the pod outright and a missing app-env
+    # Secret leaves it in CreateContainerConfigError, which is the intended
+    # loud failure rather than a pod that runs against unknown values.

k8s/argocd/projects/homelab-project.yaml

@@ -16,6 +16,12 @@ spec:
     - https://github.com/Riotpiaole/Poimen-memory.git
     - https://github.com/Riotpiaole/Poimen-workflows.git
     - https://github.com/Riotpiaole/poimen*.git
+    # ToyoGlobal (GitHub, private). The azhi-infra Application reads its
+    # manifests from here, so the URL must be listed or ArgoCD rejects the
+    # Application with "repository not permitted". A read-only credential for
+    # this repo lives in Secret azhi-infra-github in namespace argocd; it is
+    # created out-of-band and is not committed, because it is a credential.
+    - https://github.com/ToyoGlobal/azhi-infra.git
     # In-cluster Forgejo repos — explicit allowlist (no wildcard)
     - https://forgejo.riotpiao.com/riotpiao-poimen/homelab.git
     - https://forgejo.riotpiao.com/riotpiao-poimen/homelab-frontend.git