feat: LLM routing by tier (free→Ollama, pro→Timeweb)

- Add tier-based provider routing in llm-svc
  - free tier → Ollama (local qwen3.5:9b)
  - pro/business → Timeweb Cloud AI
- Add /api/v1/embed endpoint for embeddings via Ollama
- Update Ollama client: qwen3.5:9b default, remove auth
- Add GenerateEmbedding() function for qwen3-embedding:0.6b
- Add Ollama K8s deployment with GPU support (RTX 4060 Ti)
- Add monitoring stack (Prometheus, Grafana, Alertmanager)
- Add Grafana dashboards for LLM and security metrics
- Update deploy.sh with monitoring and Ollama deployment

Made-with: Cursor

backend/deploy/docker/Dockerfile.all

@@ -9,6 +9,7 @@ COPY go.mod go.sum ./
 RUN go mod download
 
 COPY . .
+RUN go mod tidy
 
 # Build all services
 RUN CGO_ENABLED=0 GOOS=linux go build -ldflags="-s -w" -o /bin/api-gateway ./cmd/api-gateway