Description: Currently, notifications are not being created for any grants. The goal of this ticket is to make sure notifications are automatically generated and stored in the database whenever a grant is created or edited. Each grant should automatically generate notifications for 2 weeks, 1 week, and 3 days before both the application deadline and each report deadline. When grant deadlines are edited or added, the notifications should also be updated or recreated accordingly.

Instructions:

• Use the existing Notification entity and type definition from the middleware (Notification.ts):
• In the grant creation route (POST /grants/new-grant):
  • Automatically create notification entries for 2 weeks, 1 week, and 3 days before each of:
    • Application deadline
    • Each report deadline
  • Use the existing notification POST route to create them.
• In the grant edit route (PUT /grants/:id):
  • If any deadlines are modified or added, automatically update or recreate corresponding notifications. This requires a new edit notification route in the backend.

Acceptance Criteria

• When a grant is created, notification records are automatically generated for all relevant deadlines.
• Each notification is stored in the database with the proper alertTime, userId, and message.
  • Message should be descriptive (e.g., “Report due in 3 days for [Grant Name]”)
• Editing a grant (application or report deadlines) updates or recreates corresponding notifications.
• A new PUT /notifications/:id or equivalent route exists to edit/update notifications.
  • No duplicate notifications are created when a grant is edited without date changes.