feat: require JSDoc in new api (#50429)

Co-authored-by: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>

api/src/middleware/index.ts

@@ -3,6 +3,13 @@ import type { NextFunction, NextHandleFunction } from '@fastify/middie';
 type MiddieRequest = Parameters<NextHandleFunction>[0];
 type MiddieResponse = Parameters<NextHandleFunction>[1];
 
+/**
+ * Test middleware used to log request and response data?
+ *
+ * @param req The request payload.
+ * @param res The response to be sent back to the request.
+ * @param next Callback function to indicate that the middleware logic is complete.
+ */
 export function testMiddleware(
   req: MiddieRequest,
   res: MiddieResponse,