fix: prevent panic in multi-table insert commit by handling missing t… (#18793)

* fix: prevent panic in multi-table insert commit by handling missing table IDs

Use unwrap_or_default() instead of unwrap() when accessing insert_rows map to avoid panic when a table ID is not found in the map.

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Co-Authored-By: Claude <noreply@anthropic.com>

* fix

---------

Co-authored-by: Claude <noreply@anthropic.com>

Author: SkyFan2002

src/query/storages/fuse/src/operations/common/processors/multi_table_insert_commit.rs

@@ -208,7 +208,7 @@ impl AsyncSink for CommitMultiTableInsert {
                                     self.ctx.txn_mgr(),
                                     *self.table_meta_timestampss.get(&tid).unwrap(),
                                     hlls.get(&tid).unwrap(),
-                                    *insert_rows.get(&tid).unwrap(),
+                                    insert_rows.get(&tid).cloned().unwrap_or_default(),
                                 )
                                 .await?;
                                 break;