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/deploy.sh

@@ -0,0 +1,56 @@
+#!/bin/bash
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+BACKEND_DIR="$(cd "$SCRIPT_DIR/../.." && pwd)"
+
+echo "=== GooSeek Go Backend K8s Deployment ==="
+echo "Backend dir: $BACKEND_DIR"
+
+# Check kubectl
+if ! command -v kubectl &> /dev/null; then
+    echo "Error: kubectl not found"
+    exit 1
+fi
+
+# Build Docker image
+echo ""
+echo "=== Building Docker image ==="
+cd "$BACKEND_DIR"
+docker build -f deploy/docker/Dockerfile.all -t gooseek/backend:latest .
+
+# Load to k3s (if using k3s)
+if command -v k3s &> /dev/null; then
+    echo ""
+    echo "=== Loading image to k3s ==="
+    docker save gooseek/backend:latest | sudo k3s ctr images import -
+fi
+
+# Apply kustomization
+echo ""
+echo "=== Applying K8s manifests ==="
+cd "$SCRIPT_DIR"
+kubectl apply -k .
+
+# Wait for rollout
+echo ""
+echo "=== Waiting for deployments ==="
+kubectl -n gooseek rollout status deployment/api-gateway --timeout=120s || true
+kubectl -n gooseek rollout status deployment/chat-svc --timeout=120s || true
+kubectl -n gooseek rollout status deployment/agent-svc --timeout=120s || true
+kubectl -n gooseek rollout status deployment/discover-svc --timeout=120s || true
+kubectl -n gooseek rollout status deployment/search-svc --timeout=120s || true
+kubectl -n gooseek rollout status deployment/redis --timeout=60s || true
+
+# Show status
+echo ""
+echo "=== Deployment Status ==="
+kubectl -n gooseek get pods
+echo ""
+kubectl -n gooseek get svc
+echo ""
+kubectl -n gooseek get ingress
+
+echo ""
+echo "=== Done ==="
+echo "API Gateway: http://localhost:3015 (NodePort) or via Ingress"