fixed issue 544,556,557,558

[victorEdeh]

closes #544
closes #556
closes #557
closes #558

Summary

#544:

1. Modified attemptDelivery function in src/modules/webhooks/webhook.service.ts:124-134 - Added start and end timestamps to measure response time
2. Added structured info log at src/modules/webhooks/webhook.service.ts:143-153 that logs all required fields when a 2xx response is received
3. No errors reported by GetDiagnostics!
   The log includes all six required fields: webhook_id , creator_id , event_type , response_status , response_time_ms , and delivered_at

#556:

• Added truncateToBytes function to string-truncate.utils.ts:22-50
• Added unit tests for truncateToBytes in string-truncate.utils.test.ts:23-56
• All tests pass and GetDiagnostics reports no errors!

#557:

1. Added pagination support to wallet holdings endpoint :

   • Updated wallet-holdings.schemas.ts to add WalletHoldingsQuerySchema that accepts limit/offset
   • Modified wallet-holdings.service.ts to accept query params and apply pagination
   • Updated wallet-holdings.controllers.ts to parse query params and use buildOffsetPaginationMeta
   • Updated existing tests to expect meta instead of total in the response

2. Created integration test : Added wallet-holdings-pagination.integration.test.ts that verifies:

   • Pagination works across multiple pages
   • No duplicates between pages
   • All items are present across all pages
   • Final page returns hasMore: false
     All changes follow existing patterns in the codebase (like creator list and creator holders endpoints), and GetDiagnostics reports no errors!

#558:

• Modified attemptDelivery in webhook.service.ts to measure response time and log a structured info message on successful delivery with webhook_id , creator_id , event_type , response_status , response_time_ms , and delivered_at !
  Then, for the string truncate to byte length:

• Added truncateToBytes function to string-truncate.utils.ts !

• Added unit tests for truncateToBytes !
  Next, for wallet holdings pagination:

• Updated wallet-holdings.schemas.ts to add a query schema with limit/offset!

• Modified wallet-holdings.service.ts to take pagination params and slice the results!

• Updated wallet-holdings.controllers.ts to parse query params and include pagination metadata!

• Created wallet-holdings-pagination.integration.test.ts to test pagination!

• Updated existing unit tests!
  Finally, for database connection pool exhaustion logs:

• Added env vars DB_POOL_WAIT_WARN_MS and DB_POOL_WAIT_ERROR_MS to config.schema.ts !

• Updated prisma.utils.ts to track active queries, measure wait time, and emit structured warnings/errors when wait thresholds are exceeded!

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