feat/objbench:

### Update `objbench.rs` and `parquet.rs` for Improved File Handling

 - **`objbench.rs`:**
   - Simplified target access layer initialization by directly using `self.target`.
   - Added assertion to ensure single file info and constructed destination file path for reporting.
   - Enhanced logging to include destination file path in write completion message.

 - **`parquet.rs`:**
   - Updated test cases to include `None` for additional parameter in function calls.

Signed-off-by: Lei, HUANG <mrsatangel@gmail.com>

src/cmd/src/bin/objbench.rs

@@ -134,9 +134,8 @@ impl Command {
         let total_rows = reader.parquet_metadata().file_metadata().num_rows();
 
         // Prepare target access layer for writing
-        let (tgt_region_dir, _tgt_file_id_hint) = split_sst_path(&self.target)?;
         let (tgt_access_layer, tgt_cache_manager) =
-            build_access_layer_simple(tgt_region_dir.clone(), object_store.clone()).await?;
+            build_access_layer_simple(self.target.clone(), object_store.clone()).await?;
 
         // Build write request
         let write_opts = WriteOptions::default();
@@ -164,9 +163,13 @@ impl Command {
                 .build()
             })?;
 
+        assert_eq!(infos.len(), 1);
+        let dst_file_id = infos[0].file_id;
+        let dts_file_path = format!("{}/{}", self.target, dst_file_id.as_parquet(),);
         // Report results
         println!(
-            "Read completed: rows={}, size={} bytes, build_reader={:?}, metrics: {:?}",
+            "Write complete, dest file: {}, rows={}, size={} bytes, build_reader={:?}, metrics: {:?}",
+            dts_file_path,
             total_rows, file_size, reader_build_elapsed, metrics
         );
         Ok(())

src/mito2/src/sst/parquet.rs

@@ -162,6 +162,7 @@ mod tests {
             metadata.clone(),
             NoopIndexBuilder,
             file_path,
+            None
         )
         .await;
 
@@ -219,6 +220,7 @@ mod tests {
             FixedPathProvider {
                 file_id: handle.file_id(),
             },
+            None
         )
         .await;