Organize imports.

kvraft/src/common.rs

@@ -1,6 +1,7 @@
-use rand::{thread_rng, RngCore};
 use std::sync::atomic::{AtomicU64, Ordering};
 
+use rand::{thread_rng, RngCore};
+
 pub type ClerkId = u64;
 #[derive(
     Clone,

kvraft/src/snapshot_holder.rs

@@ -1,10 +1,10 @@
 use std::marker::PhantomData;
 
 use parking_lot::Mutex;
+use serde::de::DeserializeOwned;
 use serde::Serialize;
 
 use ruaft::Snapshot;
-use serde::de::DeserializeOwned;
 
 #[derive(Default)]
 pub(crate) struct SnapshotHolder<T> {