feat(contracts): 日志列表 / 日志流与资源监控契约，审计新增登录失败

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Cxwgnn2pbzQ7rXv3rq7fei

packages/contracts/src/auth.ts

@@ -194,6 +194,7 @@ export type PasskeyRenameRequest = z.infer<typeof PasskeyRenameRequest>;
 export const AuditAction = z.enum([
   "admin.setup",
   "admin.login_success",
+  "admin.login_failed",
   "admin.logout",
   "admin.password_change",
   "admin.totp_enable",