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/search-svc.yaml

@@ -0,0 +1,66 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: search-svc
+  namespace: gooseek
+  labels:
+    app: search-svc
+    app.kubernetes.io/name: search-svc
+    app.kubernetes.io/part-of: gooseek
+spec:
+  replicas: 2
+  selector:
+    matchLabels:
+      app: search-svc
+  template:
+    metadata:
+      labels:
+        app: search-svc
+    spec:
+      containers:
+      - name: search-svc
+        image: gooseek/backend:latest
+        env:
+        - name: SERVICE
+          value: "search-svc"
+        - name: PORT
+          value: "3001"
+        envFrom:
+        - configMapRef:
+            name: gooseek-config
+        ports:
+        - containerPort: 3001
+          name: http
+        livenessProbe:
+          httpGet:
+            path: /health
+            port: 3001
+          initialDelaySeconds: 10
+          periodSeconds: 15
+        readinessProbe:
+          httpGet:
+            path: /ready
+            port: 3001
+          initialDelaySeconds: 5
+          periodSeconds: 10
+        resources:
+          requests:
+            cpu: 100m
+            memory: 128Mi
+          limits:
+            cpu: 500m
+            memory: 256Mi
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: search-svc
+  namespace: gooseek
+spec:
+  type: ClusterIP
+  selector:
+    app: search-svc
+  ports:
+  - port: 3001
+    targetPort: 3001
+    name: http