Add size limits for bulk updates in notification preferences

[coderabbitai]

Context

Currently, there is no limit on the number of preferences that can be updated in a single bulk update request. This could potentially lead to performance issues with large payloads.

Proposed Enhancement

Add a maximum limit to the number of preferences that can be updated in a single request to prevent potential performance issues.

Implementation Details

• Add validation in the bulk update endpoint to limit the number of preferences to 100 per request
• Return appropriate error message when the limit is exceeded

Related Links

• Pull Request: initial set up of the notifications preferences use case #4204
• Discussion: initial set up of the notifications preferences use case #4204 (comment)

Additional Notes

This enhancement will help prevent potential performance issues and ensure the API remains stable under load.

/cc @Baalmart