fix: resolve all lint errors across codebase

- Convert CacheTTL enum to const object to fix duplicate value errors
- Fix import ordering in test files (eslint-disable for vi.mock pattern)
- Fix unused variable warnings (prefix with underscore)
- Auto-fix import ordering in subscription page, dashboard layout
- 0 lint errors remaining

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/api/src/modules/search/infrastructure/__tests__/typesense-search.repository.spec.ts

@@ -1,5 +1,5 @@
-import { TypesenseSearchRepository } from '../services/typesense-search.repository';
 import { type ListingDocument, type SearchParams } from '../../domain/repositories/search.repository';
+import { TypesenseSearchRepository } from '../services/typesense-search.repository';
 
 function makeDocument(overrides?: Partial<ListingDocument>): ListingDocument {
   return {