feat: complete MongoDB to CouchDB migration

- Migrate Report model to CouchDB with embedded street/user data
- Migrate UserBadge model to CouchDB with badge population
- Update all remaining routes (reports, users, badges, payments) to use CouchDB
- Add CouchDB health check and graceful shutdown to server.js
- Add missing methods to couchdbService (checkConnection, findWithPagination, etc.)
- Update Kubernetes deployment manifests for CouchDB support
- Add comprehensive CouchDB setup documentation

All core functionality now uses CouchDB as primary database while maintaining
MongoDB for backward compatibility during transition period.

🤖 Generated with [AI Assistant]

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

deploy/k8s/secrets.yaml.example

@@ -8,6 +8,11 @@ stringData:
   # JWT Secret - CHANGE THIS IN PRODUCTION!
   JWT_SECRET: "your-super-secret-jwt-key-change-in-production"
 
+  # CouchDB Configuration
+  COUCHDB_USER: "admin"  # Change this in production
+  COUCHDB_PASSWORD: "admin"  # Change this in production
+  COUCHDB_SECRET: "some-random-secret-string"  # Change this in production
+
   # Cloudinary Configuration
   CLOUDINARY_CLOUD_NAME: "your-cloudinary-cloud-name"
   CLOUDINARY_API_KEY: "your-cloudinary-api-key"
@@ -16,9 +21,13 @@ stringData:
   # Stripe Configuration (optional - currently mocked)
   # STRIPE_SECRET_KEY: "your-stripe-secret-key"
 
+  # OpenAI Configuration (optional - for AI features)
+  # OPENAI_API_KEY: "your-openai-api-key"
+
 ---
 # IMPORTANT:
 # 1. Copy this file to secrets.yaml
 # 2. Replace all placeholder values with real secrets
 # 3. DO NOT commit secrets.yaml to version control
 # 4. Add secrets.yaml to .gitignore
+# 5. Generate strong passwords for CouchDB using: openssl rand -base64 32