feat: add governed nationwide AOI orchestration and CUDA enforcement

backend/app/schemas/detection.py

@@ -141,6 +141,7 @@ class YoloPreflightChecks(BaseModel):
 
     enabled: bool
     dependencies_available: bool | None = None
+    accelerator_ready: bool | None = None
     model_path_set: bool | None = None
     model_file_exists: bool | None = None
     model_load_requested: bool
@@ -160,6 +161,8 @@ class YoloRuntimeDetails(BaseModel):
     torch_version: str | None = None
     ultralytics_version: str | None = None
     cuda_available: bool | None = None
+    configured_device: str
+    cuda_required: bool
 
 
 class YoloPreflightResponse(BaseModel):