improvement: use db compression

src/database.rs

@@ -103,6 +103,7 @@ impl Database {
         let db = sled::Config::default()
             .path(&config.database_path)
             .cache_capacity(config.cache_capacity as u64)
+            .use_compression(true)
             .open()?;
 
         info!("Opened sled database at {}", config.database_path);