fix: cargo check --lib error

cargos/comfyui-sdk/types/api.rs

@@ -80,6 +80,7 @@ pub struct SystemInfo {
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct DeviceInfo {
     pub name: String,
+    #[serde(default = "default_device_type")]
     pub device_type: String,
     pub vram_total: u64,
     pub vram_free: u64,
@@ -87,6 +88,11 @@ pub struct DeviceInfo {
     pub torch_vram_free: u64,
 }
 
+/// Default device type when not provided by ComfyUI
+fn default_device_type() -> String {
+    "unknown".to_string()
+}
+
 /// Object info response
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct ObjectInfo {