feat:Rock刷新去UID拦截，新增绑定错误自动刷新与使用/绑定超时预警

backend/internal/database/migrations/023_rock_bound_overdue_and_auto_refresh.sql

@@ -0,0 +1,6 @@
+-- 023: Rock 绑定过期预警阈值 + 绑定错误自动刷新开关
+ALTER TABLE rock_configs ADD COLUMN IF NOT EXISTS bound_warn_days integer NOT NULL DEFAULT 2;
+ALTER TABLE rock_configs ADD COLUMN IF NOT EXISTS auto_refresh_mismatch_enabled boolean NOT NULL DEFAULT false;
+
+COMMENT ON COLUMN rock_configs.bound_warn_days IS '已绑定超过 N 天视为绑定过期预警';
+COMMENT ON COLUMN rock_configs.auto_refresh_mismatch_enabled IS '绑定错误自动刷新开关（默认关闭）';