message: fix read_block_async
diff: @@ -307,6 +307,7 @@ impl StoreReader {
  ///
  /// Loads and decompresses a block asynchronously.
  async fn read_block_async(&self, checkpoint: &Checkpoint) -> crate::AsyncIoResult<Block> {
  + let cache_key = checkpoint.byte_range.start;
  if let Some(block) = self.cache.get_from_cache(checkpoint.byte_range.start) {
  return Ok(block.clone());
  }
  @@ -316,8 +317,12 @@ impl StoreReader {
  .slice(checkpoint.byte_range.clone())
  .read_bytes_async()
  .await?;
  - let block = self.decompress_block(compressed_block, checkpoint.byte_range.start)?;
  - Ok(block)
  +
  + let decompressed_block = OwnedBytes::new(self.compressor.decompress(compressed_block.as_ref())?);
  +
  + self.cache.put_into_cache(cache_key, decompressed_block.clone());
  +
  + Ok(decompressed_block)
  }
  /// Fetches a document asynchronously.
  