fix remaining incorrect merge

Signed-off-by: technillogue <[email protected]>

Author: technillogue

storage/src/cache/mod.rs

@@ -333,7 +333,7 @@ pub trait BlobCache: Send + Sync {
 
         let duration = Instant::now().duration_since(start).as_millis();
         let duration_s = duration as f64 / 1000.0;
-        let throughput_mbps = blob_size as f64 / duration_s / 1_000_000.0;
+        let throughput_mbps = chunk.compressed_size() as f64 / duration_s / 1_000_000.0;
         debug!(
             "read_chunk_from_backend: {} {} bytes at {}, duration {}ms, throughput {:.4}Mbps",
             std::thread::current().name().unwrap_or_default(),