refactor(couchdb): move raw manifests to templates/ subdir

Per Tony's recommendation — eliminates the explicit include filter.
New manifests go in templates/ and are picked up automatically by ArgoCD.
No filter to update when adding future resources.

Moved: namespace.yaml, externalsecret.yaml, ingress-public.yaml -> templates/

cluster/applications/couchdb/templates/ingress-public.yaml

@@ -0,0 +1,34 @@
+# ------------------------------------------------------------------------------
+# FILE: cluster/applications/couchdb/ingress-public.yaml
+# DESCRIPTION: External ingress for CouchDB — communicore.mk-labs.cloud only.
+#              Separate from the Helm-managed internal ingress so each cert
+#              has the correct CN for its hostname. CN validation in Obsidian
+#              Sync requires CN=communicore.mk-labs.cloud on the public cert.
+# ------------------------------------------------------------------------------
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: couchdb-public
+  namespace: couchdb
+  annotations:
+    cert-manager.io/cluster-issuer: "letsencrypt-prod"
+    external-dns.alpha.kubernetes.io/hostname: "communicore.mk-labs.cloud"
+    external-dns.alpha.kubernetes.io/target: "ingress.mk-labs.cloud"
+    external-dns.alpha.kubernetes.io/public: "true"
+spec:
+  ingressClassName: nginx
+  rules:
+    - host: communicore.mk-labs.cloud
+      http:
+        paths:
+          - path: /
+            pathType: Prefix
+            backend:
+              service:
+                name: couchdb-svc-couchdb
+                port:
+                  number: 5984
+  tls:
+    - secretName: couchdb-tls-public
+      hosts:
+        - communicore.mk-labs.cloud