打手端流转记录改为后台配置开关控制，默认关闭

- 新增 WORKER_ORDER_TIMELINE_VISIBLE 配置（默认 false）：打手端订单详情不展示流转记录
- 打手端 events 接口按开关拦截（关闭时 403）
- profile 接口下发 orderTimelineVisible 供前端判断
- 管理端流转记录不受影响，始终可见

apps/backend/src/config/env-overrides.ts

@@ -165,6 +165,7 @@ export const ENV_OVERRIDES: readonly EnvOverride[] = [
   integerEnv('WORKER_SMS_CODE_TTL_SECONDS', ['worker', 'sms', 'codeTtlSeconds']),
   integerEnv('WORKER_SMS_COOLDOWN_SECONDS', ['worker', 'sms', 'cooldownSeconds']),
   integerEnv('WORKER_SMS_DAILY_LIMIT', ['worker', 'sms', 'dailyLimit']),
+  booleanEnv('WORKER_ORDER_TIMELINE_VISIBLE', ['worker', 'orderTimelineVisible']),
   integerEnv('KUAISHOU_FEIFEI_TIMEOUT_MS', ['platforms', 'kuaishouFeifei', 'timeoutMs']),
   stringEnv('KUAISHOU_FEIFEI_NOTIFY_URL', ['platforms', 'kuaishouFeifei', 'notifyUrl']),
   kuaishouFeifeiProductRulesEnv('KUAISHOU_FEIFEI_PRODUCT_RULES_JSON', [