CI: Rust on the dev Orin (l4t-rust): clippy -D warnings, test, build, glibc; fix 4 clippy lints

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DDwfd6Ki8UfG4hK6W5YpJz

src/obd-poller/main.rs

@@ -112,7 +112,7 @@ impl Poller {
             let Some(r) = self.sock.recv(left)? else { return Ok(None) };
             // Single frame: [length, 0x41, pid, A, B, ...]. Anything else is not our answer.
             let len = (r.data[0] & 0x0F) as usize;
-            if r.data[0] >> 4 == 0 && len >= 2 && len <= 7 && r.data[1] == 0x41 && r.data[2] == pid {
+            if r.data[0] >> 4 == 0 && (2..=7).contains(&len) && r.data[1] == 0x41 && r.data[2] == pid {
                 return Ok(Some((r.ts_us, r.id, r.data[3..1 + len].to_vec())));
             }
         }
@@ -122,8 +122,7 @@ impl Poller {
     fn discover(&self) -> std::io::Result<Vec<u8>> {
         let mut all = Vec::new();
         let mut mask = 0x00u8;
-        loop {
-            let Some((_, _, d)) = self.ask(mask)? else { break };
+        while let Some((_, _, d)) = self.ask(mask)? {
             if d.len() < 4 {
                 break;
             }