feat: add parts catalogs integration, catalog prefetch worker, and vehicle select modal

Integrate external parts catalogs API with auth service, add BullMQ-based
catalog prefetch worker for background data caching, expand vehicles service
with shared vehicle support, and add vehicle select modal to frontend.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/api/package.json

@@ -69,6 +69,7 @@
     "playwright": "^1.50.0",
     "tsx": "^4.19.0",
     "typescript": "^5.7.0",
+    "undici": "^7.22.0",
     "vitest": "^3.0.0"
   }
 }