v0.17.3: fix scsi_recovery.rs Linux compile (missing Duration import)

tests/scsi_recovery.rs:
- Add `use std::time::Duration` inside both `#[cfg(target_os = "linux")]`
  blocks. Locally on macOS the linux blocks are cfg-out so the missing
  import was invisible to precommit on macOS.
- Bug pre-dated this branch but only surfaced when v0.17.2 release CI
  ran the test compile on Linux.

Cargo.toml: 0.17.2 -> 0.17.3.

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "libfreemkv"
-version = "0.17.2"
+version = "0.17.3"
 edition = "2024"
 rust-version = "1.86"
 license = "AGPL-3.0-only"

tests/scsi_recovery.rs

@@ -24,6 +24,7 @@ fn test_sgio_transport_timeout_does_not_kill_transport() {
         use libfreemkv::scsi::{DataDirection, SCSI_STATUS_TRANSPORT_FAILURE};
         use std::sync::Arc;
         use std::sync::atomic::{AtomicI32, Ordering};
+        use std::time::Duration;
 
         let mut transport = SgIoTransport::open(_path).expect("open device");
         let fd_before = transport.fd;
@@ -93,6 +94,8 @@ fn test_drive_read_per_cdb_timeout_bounds_call() {
 
     #[cfg(target_os = "linux")]
     {
+        use std::time::Duration;
+
         let mut drive = libfreemkv::Drive::open(_path).expect("open drive");
         let timeout_ms: u32 = 5_000;