fix(race): 代码质量审查修复 + commands包拆分 + 赛马取消命令

- P1: bet.py赔率计算移入锁内防竞态
- P1: config.py TESTERS解析失败添加warning日志
- P2: 新增赛马取消命令(积分退还/任务取消/状态重置)
- P3: bet.py清理未使用的_send_to_scope导入
- 将commands.py拆分为commands/包(access/bet/help/race/register)
- OpenSpec变更提案: fix-race-conditions-and-logs

danding_bot/plugins/group_horse_racing/commands/access.py

@@ -0,0 +1,31 @@
+from nonebot.adapters.onebot.v11 import Bot, Event, GroupMessageEvent, PrivateMessageEvent
+from .. import plugin_config as config
+
+def get_scope(event: Event) -> str:
+    """Get room scope from event."""
+    if isinstance(event, GroupMessageEvent):
+        return f"group_{event.group_id}"
+    elif isinstance(event, PrivateMessageEvent):
+        return f"test_{event.user_id}"
+    return ""
+
+
+async def check_access(bot: Bot, event: Event) -> bool:
+    """Check if user has access to horse racing."""
+    if isinstance(event, PrivateMessageEvent):
+        if not config.TEST_MODE:
+            return False
+        return event.user_id in config.TESTERS
+
+    if isinstance(event, GroupMessageEvent):
+        if config.TEST_MODE:
+            return event.group_id in config.TEST_GROUPS
+        return event.group_id in config.ALLOWED_GROUPS
+
+    return False
+
+
+def get_event_id(event: Event) -> str:
+    """Get user id as string from event."""
+    return str(event.user_id)
+