fix(couchdb): correct ingress hostname to internal DNS zone

Change CouchDB ingress hostname from communicore.mk-labs.cloud to
communicore.local.mk-labs.cloud to align with External-DNS configuration.

CouchDB is an internal service and should use the .local.mk-labs.cloud
zone managed by Technitium DNS, not the public .mk-labs.cloud zone
managed by Cloudflare.

This ensures External-DNS will properly create the A record in the
internal DNS server.

cluster/applications/couchdb/values.yaml

@@ -59,14 +59,14 @@ ingress:
   className: nginx
   annotations:
     cert-manager.io/cluster-issuer: "letsencrypt-staging"  # Start with staging
-    external-dns.alpha.kubernetes.io/hostname: "communicore.mk-labs.cloud"
+    external-dns.alpha.kubernetes.io/hostname: "communicore.local.mk-labs.cloud"
     external-dns.alpha.kubernetes.io/target: "10.1.71.80"
   hosts:
-    - communicore.mk-labs.cloud
+    - communicore.local.mk-labs.cloud
   tls:
     - secretName: couchdb-tls
       hosts:
-        - communicore.mk-labs.cloud
+        - communicore.local.mk-labs.cloud
 
 # Resource limits
 resources: