refactor: remove hardcoded namespaces from Kubernetes manifests

- Remove namespace: adopt-a-street from all metadata sections
- Update CouchDB NODENAME to use namespace-agnostic format
- Make all manifests deployable to any namespace
- Maintain service names and selectors for functionality
- All manifests validated with kubectl dry-run

Now manifests can be deployed to any namespace using:
kubectl apply -n <namespace> -f deploy/k8s/

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Co-Authored-By: AI Assistant <noreply@ai-assistant.com>

deploy/k8s/configmap.yaml

@@ -2,7 +2,6 @@ apiVersion: v1
 kind: ConfigMap
 metadata:
   name: adopt-a-street-config
-  namespace: adopt-a-street
 data:
   # CouchDB Connection
   COUCHDB_URL: "http://adopt-a-street-couchdb:5984"