fix: move obsidian ingress to homelab repo, use obsidian.riotpiao.com

vault.riotpiao.com was already taken by HashiCorp Vault.
Ingress now managed centrally in homelab/k8s/bootstrap/ingress/ingress.yaml

k8s/app/obsidian.yaml

@@ -146,32 +146,5 @@ metadata:
   labels:
     app.kubernetes.io/name: obsidian-server
 
----
-# Ingress for external access
-apiVersion: networking.k8s.io/v1
-kind: Ingress
-metadata:
-  name: obsidian-server
-  namespace: poimen
-  annotations:
-    cert-manager.io/cluster-issuer: letsencrypt-prod
-    # TODO: Add Authentik forward-auth once outpost is deployed
-    # nginx.ingress.kubernetes.io/auth-url: https://<outpost>/outpost.goauthentik.io/auth/nginx
-    # nginx.ingress.kubernetes.io/auth-signin: https://authentik.riotpiao.com/outpost.goauthentik.io/start?rd=$scheme://$host$request_uri
-spec:
-  ingressClassName: nginx
-  tls:
-  - hosts:
-    - vault.riotpiao.com
-    secretName: obsidian-tls
-  rules:
-  - host: vault.riotpiao.com
-    http:
-      paths:
-      - path: /
-        pathType: Prefix
-        backend:
-          service:
-            name: obsidian-server
-            port:
-              number: 80
+# Ingress managed by homelab repo (obsidian.riotpiao.com)
+# See: homelab/k8s/bootstrap/ingress/ingress.yaml