feat: add governed nationwide AOI orchestration and CUDA enforcement

backend/app/services/yolo_preflight_service.py

@@ -38,6 +38,7 @@ class YoloPreflightService:
             "checks": {
                 "enabled": resolved_settings.yolo_enabled,
                 "dependencies_available": None,
+                "accelerator_ready": None,
                 "model_path_set": None,
                 "model_file_exists": None,
                 "model_load_requested": check_model_load,
@@ -70,6 +71,21 @@ class YoloPreflightService:
             result["message"] = "YOLO dependencies are not installed. Install backend optional extras with geointel-backend[ai]."
             return result
 
+        if not assume_dependencies:
+            try:
+                adapter = yolo_adapter_class(resolved_settings)
+                validate_runtime = getattr(adapter, "validate_runtime", None)
+                if validate_runtime is not None:
+                    validate_runtime()
+            except AppError as exc:
+                result["checks"]["accelerator_ready"] = False
+                result["status"] = "accelerator_unavailable"
+                result["message"] = exc.message
+                result["error_code"] = exc.code
+                result["details"] = exc.details
+                return result
+        result["checks"]["accelerator_ready"] = True
+
         result["checks"]["model_path_set"] = bool(resolved_settings.yolo_model_path)
         if not resolved_settings.yolo_model_path:
             result["message"] = "YOLO_MODEL_PATH is not set. GeoIntel will not download model weights automatically."
@@ -143,6 +159,8 @@ class YoloPreflightService:
             "torch_version": YoloPreflightService._package_version("torch"),
             "ultralytics_version": YoloPreflightService._package_version("ultralytics"),
             "cuda_available": None,
+            "configured_device": settings.yolo_device,
+            "cuda_required": settings.yolo_require_cuda,
         }
 
     @staticmethod