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/master-agents-svc/package.json

@@ -13,11 +13,14 @@
     "@fastify/cors": "^9.0.1",
     "@toolsycc/json-repair": "^0.1.22",
     "fastify": "^4.28.1",
+    "franc": "^6.2.0",
+    "https-proxy-agent": "^7.0.6",
     "mathjs": "^15.1.0",
     "ollama": "^0.6.3",
     "openai": "^6.9.0",
     "partial-json": "^0.1.7",
     "rfc6902": "^5.1.2",
+    "socks-proxy-agent": "^8.0.5",
     "turndown": "^7.2.2",
     "yahoo-finance2": "^3.13.0",
     "zod": "^4.1.12"