chore(statedb): flush writer in genesis verify command with reverse o…

…ption (#2530)

Ensure the writer is flushed to disk in the genesis verify reverse process. This change resolves potential issues with data not being fully written when kill process after finish address_mapping checking

crates/rooch/src/commands/statedb/commands/genesis_verify.rs

@@ -322,7 +322,7 @@ fn verify_reverse(
         RoochToBitcoinAddressMapping::object_id(),
         &mut writer,
     )?;
-
+    writer.flush()?;
     ExportCommand::export_object(
         &moveos_store_arc,
         root_state_root,