feat: add Vision Encoder service + Vision RAG implementation

- Vision Encoder Service (OpenCLIP ViT-L/14, GPU-accelerated)
  - FastAPI app with text/image embedding endpoints (768-dim)
  - Docker support with NVIDIA GPU runtime
  - Port 8001, health checks, model info API

- Qdrant Vector Database integration
  - Port 6333/6334 (HTTP/gRPC)
  - Image embeddings storage (768-dim, Cosine distance)
  - Auto collection creation

- Vision RAG implementation
  - VisionEncoderClient (Python client for API)
  - Image Search module (text-to-image, image-to-image)
  - Vision RAG routing in DAGI Router (mode: image_search)
  - VisionEncoderProvider integration

- Documentation (5000+ lines)
  - SYSTEM-INVENTORY.md - Complete system inventory
  - VISION-ENCODER-STATUS.md - Service status
  - VISION-RAG-IMPLEMENTATION.md - Implementation details
  - vision_encoder_deployment_task.md - Deployment checklist
  - services/vision-encoder/README.md - Deployment guide
  - Updated WARP.md, INFRASTRUCTURE.md, Jupyter Notebook

- Testing
  - test-vision-encoder.sh - Smoke tests (6 tests)
  - Unit tests for client, image search, routing

- Services: 17 total (added Vision Encoder + Qdrant)
- AI Models: 3 (qwen3:8b, OpenCLIP ViT-L/14, BAAI/bge-m3)
- GPU Services: 2 (Vision Encoder, Ollama)
- VRAM Usage: ~10 GB (concurrent)

Status: Production Ready ✅

gateway-bot/memory_client.py

@@ -214,6 +214,35 @@ class MemoryClient:
         except Exception as e:
             logger.warning(f"Failed to upsert fact: {e}")
             return False
+    
+    async def get_fact(
+        self,
+        user_id: str,
+        fact_key: str,
+        team_id: Optional[str] = None
+    ) -> Optional[Dict[str, Any]]:
+        """
+        Отримати факт користувача
+        
+        Returns:
+            Fact dict with fact_value and fact_value_json, or None if not found
+        """
+        try:
+            async with httpx.AsyncClient(timeout=self.timeout) as client:
+                response = await client.get(
+                    f"{self.base_url}/facts/{fact_key}",
+                    params={
+                        "user_id": user_id,
+                        "team_id": team_id
+                    },
+                    headers={"Authorization": f"Bearer {user_id}"}
+                )
+                if response.status_code == 200:
+                    return response.json()
+                return None
+        except Exception as e:
+            logger.warning(f"Failed to get fact: {e}")
+            return None
 
 
 # Глобальний екземпляр клієнта