Available Endpoints:
GET /health - Health check endpoint
POST /api/auth/send-otp - Send OTP for authentication
POST /api/auth/verify-otp - Verify OTP and login
POST /api/upload/presign - Get presigned URL for single file upload
POST /api/upload/presign-multiple - Get presigned URLs for multiple file uploads
GET /api/conversations - List user conversations
POST /api/conversations - Create new conversation
GET /api/messages/:conversationId - Get messages for conversation
GET /api/contacts/sync-status - Check contact sync status
POST /api/contacts/sync - Sync contacts
For detailed API documentation, please refer to the project README.md file.