style: no new #[allow] for the Windows enumeration helpers

Name STORAGE_DEVICE_NUMBER's fields in snake_case (repr(C) layout is
unchanged) and compile the 36-byte INQUIRY retry only on Windows, which keeps
lint_stop's #[allow] baseline.

src/scsi/mod.rs

@@ -548,7 +548,7 @@ pub fn inquiry(scsi: &mut dyn ScsiTransport) -> Result<InquiryResult> {
 }
 
 /// INQUIRY with the standard 36-byte allocation, for bridges that reject longer ones.
-#[cfg_attr(not(windows), allow(dead_code))]
+#[cfg(windows)]
 pub(crate) fn inquiry_standard(scsi: &mut dyn ScsiTransport) -> Result<InquiryResult> {
     inquiry_alloc(scsi, INQUIRY_MIN_LEN)
 }

src/scsi/windows.rs

@@ -108,13 +108,12 @@ struct StorageAdapterDescriptor {
     BusMinorVersion: u16,
 }
 
-/// `STORAGE_DEVICE_NUMBER` (winioctl.h).
+/// `STORAGE_DEVICE_NUMBER` (winioctl.h): DeviceType, DeviceNumber, PartitionNumber.
 #[repr(C)]
-#[allow(non_snake_case)]
 struct StorageDeviceNumber {
-    DeviceType: u32,
-    DeviceNumber: u32,
-    PartitionNumber: u32,
+    device_type: u32,
+    device_number: u32,
+    _partition_number: u32,
 }
 
 // ── Windows FFI ────────────────────────────────────────────────────────────
@@ -368,7 +367,7 @@ fn device_number(path: &str) -> Option<u32> {
         )
     };
     unsafe { CloseHandle(handle) };
-    (ok != 0 && number.DeviceType == FILE_DEVICE_CD_ROM).then_some(number.DeviceNumber)
+    (ok != 0 && number.device_type == FILE_DEVICE_CD_ROM).then_some(number.device_number)
 }
 
 /// TEST UNIT READY probe on Windows. No in-library recovery: the answer is