Integrate Cloudinary for cloud-based image and video storage

Implement Cloudinary integration for uploading, storing, and transforming media files, including a new settings section for user configuration and API endpoints for media management.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: ae4037a0-2a6f-4530-9bac-79b543286bda
Replit-Commit-Checkpoint-Type: intermediate_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/397bca8c-984f-43ff-841a-10897aeb8140/ae4037a0-2a6f-4530-9bac-79b543286bda/p0c5kxJ

docker-compose.yml

@@ -40,8 +40,6 @@ services:
       OPENROUTER_API_KEY: ${OPENROUTER_API_KEY}
       SESSION_SECRET: ${SESSION_SECRET:-your-secret-key-change-me}
       APP_URL: ${APP_URL:-http://localhost:5000}
-    volumes:
-      - ./uploads:/app/uploads
     networks:
       - internal
       - nginx_default