feat: re-export ObjectHead as public (#253)

Author: ethe

fusio-manifest/src/lib.rs

@@ -21,7 +21,7 @@ pub use crate::{
     checkpoint::{CheckpointStore, CheckpointStoreImpl},
     head::{HeadStore, HeadStoreImpl},
     lease::{LeaseStore, LeaseStoreImpl},
-    segment::{SegmentIo, SegmentStoreImpl},
+    segment::{ObjectHead, SegmentIo, SegmentStoreImpl},
 };
 pub(crate) mod backoff;
 pub use backoff::BackoffPolicy;

fusio-manifest/src/segment.rs

@@ -68,7 +68,8 @@ pub struct SegmentStoreImpl<FS> {
 
 const TXN_ID_HEADER: &str = "x-amz-meta-fusio-txn-id";
 
-trait ObjectHead {
+/// Capability for fetching object metadata without downloading the payload.
+pub trait ObjectHead {
     fn head_metadata<'a>(
         &'a self,
         path: &'a Path,