Add documentation for rust for release

Author: leekeiabstraction

crates/fluss/src/client/table/mod.rs

@@ -22,6 +22,7 @@ use crate::metadata::{TableInfo, TablePath};
 use std::sync::Arc;
 
 pub const EARLIEST_OFFSET: i64 = -2;
+pub const LATEST_OFFSET: i64 = -1;
 
 mod append;
 mod lookup;