fix(backend): use relative imports instead of bare 'src/...' paths

Vitest 4 no longer resolves bare 'src/...' specifiers, breaking test loading in @clerk/backend.

Author: jacekradko

packages/backend/src/api/endpoints/JwtTemplatesApi.ts

@@ -1,5 +1,5 @@
 import type { ClerkPaginationRequest } from '@clerk/shared/types';
-import { joinPaths } from 'src/util/path';
+import { joinPaths } from '../../util/path';
 
 import type { DeletedObject, JwtTemplate } from '../resources';
 import type { PaginatedResourceResponse } from '../resources/Deserializer';

packages/backend/src/api/endpoints/WaitlistEntryApi.ts

@@ -1,5 +1,5 @@
 import type { ClerkPaginationRequest } from '@clerk/shared/types';
-import { joinPaths } from 'src/util/path';
+import { joinPaths } from '../../util/path';
 
 import type { DeletedObject } from '../resources/DeletedObject';
 import type { PaginatedResourceResponse } from '../resources/Deserializer';

packages/backend/src/webhooks.ts

@@ -1,5 +1,5 @@
 import { getEnvVariable } from '@clerk/shared/getEnvVariable';
-import { errorThrower } from 'src/util/shared';
+import { errorThrower } from './util/shared';
 import { Webhook } from 'standardwebhooks';
 
 import type { WebhookEvent } from './api/resources/Webhooks';