feat: complete MongoDB to CouchDB migration and deployment

- Remove all mongoose dependencies from backend
- Convert Badge and PointTransaction models to CouchDB
- Fix gamificationService for CouchDB architecture
- Update Docker registry URLs to use HTTPS (port 443)
- Fix ingress configuration for HAProxy
- Successfully deploy multi-architecture images
- Application fully running on Kubernetes with CouchDB

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

backend/Dockerfile

@@ -7,7 +7,7 @@ WORKDIR /app
 COPY package*.json ./
 
 # Install dependencies
-RUN bun install --frozen-lockfile --production
+RUN bun install --production
 
 # Copy source code
 COPY . .