fix：声网管理pid

server-service/src/main/java/com/makeit/service/platform/device/impl/PlatDeviceServiceImpl.java

@@ -848,10 +848,10 @@ public class PlatDeviceServiceImpl extends ServiceImpl<PlatDeviceMapper, PlatDev
                 .orderByAsc(BaseEntity::getCreateDate)
                 .last("limit 1"));
         if (saasPidManage == null) {
-            return;
+            throw new RuntimeException("当前没有可用的pid");
         }
-        saasPidManage.setUsedCredit(saasPidManage.getUsedCredit() + 1);
-        saasPidManage.setAvailableCredit(saasPidManage.getAvailableCredit() - 1);
+        saasPidManage.setUsedCredit(Math.min(saasPidManage.getUsedCredit() + 1,saasPidManage.getTotalCredit()));
+        saasPidManage.setAvailableCredit(Math.max(saasPidManage.getAvailableCredit() - 1,0));
         if (Objects.equals(saasPidManage.getAvailableCredit(), saasPidManage.getUsedCredit())) {
             saasPidManage.setStatus("0");
         }