Harden RC7 API response contracts

backend/app/schemas/detection.py

@@ -129,3 +129,48 @@ class DetectionRead(BaseModel):
 class DetectionListResponse(BaseModel):
     items: list[DetectionRead]
     total: int
+
+
+class YoloPreflightChecks(BaseModel):
+    model_config = ConfigDict(protected_namespaces=())
+
+    enabled: bool
+    dependencies_available: bool | None = None
+    model_path_set: bool | None = None
+    model_file_exists: bool | None = None
+    model_load_requested: bool
+    model_load_ok: bool | None = None
+    manifest_path_set: bool | None = None
+    manifest_valid: bool | None = None
+    tile_paths_exist: bool | None = None
+    tile_limit_ok: bool | None = None
+
+
+class YoloRuntimeDetails(BaseModel):
+    model_config = ConfigDict(protected_namespaces=())
+
+    dependencies_assumed: bool
+    model_directory: str | None = None
+    yolo_config_dir: str | None = None
+    torch_version: str | None = None
+    ultralytics_version: str | None = None
+    cuda_available: bool | None = None
+
+
+class YoloPreflightResponse(BaseModel):
+    model_config = ConfigDict(protected_namespaces=())
+
+    model_id: str
+    model_asset_id: str | None = None
+    model_path: str | None = None
+    tile_manifest_path: str | None = None
+    status: str
+    message: str
+    checks: YoloPreflightChecks
+    tile_count: int
+    max_tiles: int
+    will_download_models: bool
+    will_run_inference: bool
+    runtime: YoloRuntimeDetails
+    error_code: str | None = None
+    details: dict | None = None