feat: Go backend, enhanced search, new widgets, Docker deploy

Major changes:
- Add Go backend (backend/) with microservices architecture
- Enhanced master-agents-svc: reranker, content-classifier, stealth-crawler,
  proxy-manager, media-search, fastClassifier, language detection
- New web-svc widgets: KnowledgeCard, ProductCard, ProfileCard, VideoCard,
  UnifiedCard, CardGallery, InlineImageGallery, SourcesPanel, RelatedQuestions
- Improved discover-svc with discover-db integration
- Docker deployment improvements (Caddyfile, vendor.sh, BUILD.md)
- Library-svc: project_id schema migration
- Remove deprecated finance-svc and travel-svc
- Localization improvements across services

Made-with: Cursor

services/cache-worker/package.json

@@ -11,7 +11,9 @@
     "build": "tsc"
   },
   "dependencies": {
-    "ioredis": "^5.4.1"
+    "https-proxy-agent": "^7.0.6",
+    "ioredis": "^5.4.1",
+    "socks-proxy-agent": "^8.0.5"
   },
   "devDependencies": {
     "@types/node": "^22.10.0",