fix(alembic): 缩短 withdraw 迁移 revision id 至 varchar(32) 内

drop_withdraw_active_unique_index (33 字符) 超过 alembic_version.version_num
的 varchar(32) 上限,生产 alembic 写版本号时 StringDataRightTruncation 报错、
部署中断。改短为 drop_withdraw_active_uniq_idx (29 字符):迁移逻辑(drop_index)
一字不变、无下游引用、仍为唯一 head。

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

alembic/versions/drop_withdraw_active_uniq_idx.py

@@ -1,6 +1,6 @@
 """drop withdraw active-order partial unique index (allow multiple in-flight withdrawals)
 
-Revision ID: drop_withdraw_active_unique_index
+Revision ID: drop_withdraw_active_uniq_idx
 Revises: d8dd2106e438
 Create Date: 2026-07-24 00:00:00.000000
 
@@ -12,7 +12,7 @@ import sqlalchemy as sa
 
 
 # revision identifiers, used by Alembic.
-revision: str = "drop_withdraw_active_unique_index"
+revision: str = "drop_withdraw_active_uniq_idx"
 down_revision: Union[str, Sequence[str], None] = "d8dd2106e438"
 branch_labels: Union[str, Sequence[str], None] = None
 depends_on: Union[str, Sequence[str], None] = None