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

backend/deploy/k8s/configmap.yaml

@@ -0,0 +1,32 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: gooseek-config
+  namespace: gooseek
+data:
+  SEARXNG_URL: "http://searxng:8080"
+  CRAWL4AI_URL: "http://crawl4ai:11235"
+  REDIS_URL: "redis://redis:6379"
+  DATABASE_URL: "postgres://gooseek:gooseek@postgres:5432/gooseek?sslmode=disable"
+  DISCOVER_SVC_URL: "http://discover-svc:3002"
+  MASTER_AGENTS_SVC_URL: "http://agent-svc:3018"
+  SEARCH_SVC_URL: "http://search-svc:3001"
+  LLM_SVC_URL: "http://llm-svc:3020"
+  SCRAPER_SVC_URL: "http://scraper-svc:3021"
+  COLLECTION_SVC_URL: "http://collection-svc:3025"
+  FILE_SVC_URL: "http://file-svc:3026"
+  THREAD_SVC_URL: "http://thread-svc:3027"
+---
+apiVersion: v1
+kind: Secret
+metadata:
+  name: gooseek-secrets
+  namespace: gooseek
+type: Opaque
+stringData:
+  OPENAI_API_KEY: "${OPENAI_API_KEY}"
+  ANTHROPIC_API_KEY: "${ANTHROPIC_API_KEY}"
+  GEMINI_API_KEY: "${GEMINI_API_KEY}"
+  JWT_SECRET: "${JWT_SECRET}"
+  POSTGRES_USER: "gooseek"
+  POSTGRES_PASSWORD: "gooseek"