Add `audit` endpoint to retrieve change history records for submitted data

[leoraba]

Implementation for GET /audit/category/:categoryId/organization/:organization endpoint.

Includes:

• Added Swagger doc to describe Audit endpoint
• Optional Filter options (query params): entityName, eventType, systemId
• Pagination support
• Unit testing for audit utils.
• Using a Request hander function to validate input request using Zod schemas

[leoraba]

Updated this PR to follow comments and suggestions. This is now ready for code review.

[leoraba]

PR updated. Ready for code review