Feat/event

[nafiuishaaq]

Key Changes Made:

1. Added Internal Notification Controller (src/notifications/controllers/internal-notification.controller.ts)

   • Secured with ServiceAuthGuard - only accessible to internal services with valid service tokens
   • Exposes /internal/notifications/process-event endpoint that accepts protocol events
   • Uses the existing processIncomingEvent method from the main NotificationsService

2. Updated Existing Notifications Module (src/notifications/notifications.module.ts)

   • Added the new InternalNotificationController to the controllers array
   • Maintains full compatibility with all existing notification functionality

3. Cleaned Up Duplicate Files

   • Removed the redundant notification module and services I initially created since there was already a comprehensive implementation
   • Ensured all functionality is properly integrated into the existing codebase

The New Endpoint:

POST /internal/notifications/process-event

Accepts events in the format:

{
  eventType: string;        // e.g., "claim.created", "security.alert"
  source: string;           // Service name sending the event
  timestamp: Date;          // When the event occurred
  payload: Record<string, any>; // Event-specific data
  recipientIds: string[];   // List of users to notify
}

This endpoint automatically:

• Maps event types to notification categories
• Generates human-readable titles and messages
• Checks user notification preferences before sending
• Queues notifications for delivery through enabled channels (in-app, WebSocket, email, push, webhook)
• Tracks delivery status with retries for reliability
• Records metrics for monitoring

The integration maintains all existing functionality while adding the requested internal service endpoint for cross-service communication.

closes #280