修复发布就绪等待与充值过期监听

为 API readiness 探测增加单次超时，避免端口已建立时无限挂起
修复 SpacetimeDB 枚举状态订阅导致的充值过期监听失败
在 pause-after-stdb 审批提示中强调运行时与迁移身份互斥
补齐生产发布门禁、回归测试与运维排障文档

scripts/deploy/production-api-deploy.sh

@@ -1126,7 +1126,7 @@ wait_for_worker_controller_service "${WORKER_CONTROLLER_SERVICE}"
 
 echo "[production-api-deploy] 等待 readiness: ${HEALTH_URL}"
 for _ in {1..30}; do
-  if curl -fsS "${HEALTH_URL}" >/dev/null; then
+  if curl -fsS --max-time 2 "${HEALTH_URL}" >/dev/null; then
     if [[ "${KEEP_MAINTENANCE_MODE}" -eq 1 ]]; then
       echo "[production-api-deploy] readiness 通过，按参数保持维护模式: ${MAINTENANCE_FILE}"
     else