Fix debug-tools musl build: gate tokio-uring on non-musl targets (#10419)

The debug-tools workflow cross-compiles for x86_64-unknown-linux-musl,
but tokio-uring 0.5.0 requires libc::statx which is unavailable on musl.
Skip the tokio-uring dependency on musl and fall back to sync io_uring reads.

lib/common/common/Cargo.toml

@@ -69,6 +69,11 @@ tango-bench = "0.8.0"
 io-uring = "0.7.12"
 procfs = { version = "0.18", default-features = false }
 thread-priority = "3.0.0"
+
+# tokio-uring uses libc::statx, which is unavailable on x86_64 musl in libc
+# (see https://github.com/tokio-rs/tokio-uring/issues/316). Debug tools are
+# built for x86_64-unknown-linux-musl; async reads fall back to the sync path.
+[target.'cfg(all(target_os = "linux", not(target_env = "musl")))'.dependencies]
 tokio-uring = "0.5.0"
 
 [[bench]]

lib/common/common/src/universal_io/io_uring/mod.rs

@@ -2,6 +2,7 @@ mod error;
 mod pipeline;
 mod pool;
 mod runtime;
+#[cfg(not(target_env = "musl"))]
 mod tokio_bridge;
 
 #[cfg(test)]
@@ -220,9 +221,16 @@ impl UniversalRead for IoUringFile {
         _access_pattern: P,
         align: usize,
     ) -> UioResult<ACow<'_>> {
-        Ok(ACow::Owned(
-            tokio_bridge::read_bytes_async(self, range, align).await?,
-        ))
+        #[cfg(not(target_env = "musl"))]
+        {
+            return Ok(ACow::Owned(
+                tokio_bridge::read_bytes_async(self, range, align).await?,
+            ));
+        }
+        #[cfg(target_env = "musl")]
+        {
+            self.read_bytes::<P>(range, _access_pattern, align)
+        }
     }
 
     fn len<T>(&self) -> UioResult<u64> {