message: export latest read files to array instead of object
diff: @@ -409,7 +409,7 @@ impl GlobalIOStats {
  }
  fn export_latest_read_files(&self) -> Result<String, IoStatsError> {
  - Ok(serde_json::json!({"latest_read_files": self.recent_read_files.bitmap_to_array_and_clear()}).to_string())
  + Ok(serde_json::json!(self.recent_read_files.bitmap_to_array_and_clear()).to_string())
  }
  fn export_files_access_patterns(&self) -> Result<String, IoStatsError> {
  