fix: comprehensive Kubernetes configuration review and fixes

- Add namespace.yaml to create adopt-a-street namespace
- Add namespace to all resource metadata (Services, Deployments, StatefulSet, ConfigMap, Secrets, Ingress)
- Fix CouchDB NODENAME to proper StatefulSet format (adopt-a-street-couchdb-0.adopt-a-street-couchdb)
- Add missing environment variables (STRIPE, OPENAI, CouchDB connection pool settings)
- Fix duplicate Cloudinary variables between ConfigMap and Secrets
- Remove duplicate registry-secret.yaml file (security risk)
- Remove unused couchdb-configmap.yaml
- Complete rewrite of DEPLOYMENT_GUIDE.md with namespace-aware instructions
- Add comprehensive CHANGES.md documenting all fixes and rationale

Fixes address all HIGH and MEDIUM priority issues identified in configuration review:
- Namespace configuration (HIGH)
- Missing resources (HIGH)
- CouchDB NODENAME format (MEDIUM)
- Missing environment variables (MEDIUM)
- Duplicate files (MEDIUM)
- Documentation updates (MEDIUM)

All health checks verified, service discovery tested, and deployment process documented.

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

deploy/k8s/configmap.yaml

@@ -2,11 +2,16 @@ 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"
   COUCHDB_DB_NAME: "adopt-a-street"
 
+  # CouchDB Connection Pool Settings (optional)
+  COUCHDB_MAX_CONNECTIONS: "10"
+  COUCHDB_REQUEST_TIMEOUT: "30000"
+
   # Backend Configuration
   PORT: "5000"
   NODE_ENV: "production"
@@ -14,12 +19,14 @@ data:
   # Frontend URL (update with your actual domain)
   FRONTEND_URL: "http://adopt-a-street.local"
 
-  # Cloudinary Configuration (placeholders - update with real values)
+  # Cloudinary Configuration (non-sensitive values only)
+  # Note: CLOUDINARY_API_SECRET should be in secrets.yaml
   CLOUDINARY_CLOUD_NAME: "your-cloudinary-cloud-name"
-  CLOUDINARY_API_KEY: "your-cloudinary-api-key"
 
   # Stripe Configuration (optional - currently mocked)
-  # STRIPE_PUBLISHABLE_KEY: "your-stripe-publishable-key"
+  # Note: STRIPE_SECRET_KEY should be in secrets.yaml
+  STRIPE_PUBLISHABLE_KEY: "your-stripe-publishable-key"
 
   # OpenAI Configuration (optional - for AI features)
-  # OPENAI_API_KEY: "your-openai-api-key"
+  # Note: OPENAI_API_KEY should be in secrets.yaml
+  OPENAI_MODEL: "gpt-3.5-turbo"