I#160#165 Send Push Notification

[Shahed-Chy-Suzan]

Fixes #160 #165

• [x] Does not depend on other PRs
• [ ] Depends on other PR being merged first: #

What kind of change does this PR introduce?

• [x] New feature

How would you describe the changes in a changelog?

Added push notification system with user device token registration and notification delivery functionality through AWS SQS-SNS infrastructure.

Related Issues/PRs

• Issue #160: Device token registration implementation
• Issue #165: Push notification delivery system implementation

How to test

• [ ] Needs regression testing (add QA needed label)

Testing steps:

1. Register device token:

   • Send POST request to /notification/register with device token
   • Verify token is saved in DynamoDB user profile

2. Send push notification:

   • Send POST request to /notification/push/{userId} with notification payload
   • Verify notification is queued in SQS
   • Confirm delivery through SNS topic

Checklist

• [x] I have tested these changes locally and they function as expected
• [ ] I have added necessary documentation (OpenAPI specs)
• [x] I have followed the project's coding style (TypeScript, Clean Architecture)
• [x] I have updated necessary OpenAPI specs
• [x] Infrastructure is defined using Terraform following project standards