fix(credit): 修正用户积分和信用分数记录的初始值

- 将新用户积分初始值从 50 调整为 8
- 将新用户信用分数初始值从 50 调整为 8
- 更新现有用户积分增量计算逻辑，从每次增加 50 改为 8
- 修正信用记录表中积分和分数的更新逻辑，保持数值一致性

alien-store/src/main/java/shop/alien/store/service/impl/LifeUserCreditScoreInfoServiceImpl.java

@@ -53,8 +53,8 @@ public class LifeUserCreditScoreInfoServiceImpl extends ServiceImpl<LifeUserCred
         if (null == existingPoints) {
             SecondUserCreditRecord record = new SecondUserCreditRecord();
             record.setUserId(userId);
-            record.setPoints(50);
-            record.setCurrentScoreCount(50);
+            record.setPoints(8);
+            record.setCurrentScoreCount(8);
             record.setPointsType(9);
             secondUserCreditRecordMapper.insert(record);
 
@@ -65,13 +65,13 @@ public class LifeUserCreditScoreInfoServiceImpl extends ServiceImpl<LifeUserCred
             queryWrapperByUserId.eq("userId", userId);
             SecondUserCredit secondUserCredit = secondUserCreditMapper.selectOne(new LambdaQueryWrapper<SecondUserCredit>().eq(SecondUserCredit::getUserId, userId));
             if (null != secondUserCredit) {
-                secondUserCredit.setUserPoints(secondUserCredit.getUserPoints() + 50);
+                secondUserCredit.setUserPoints(secondUserCredit.getUserPoints() + 8);
                 secondUserCreditMapper.updateById(secondUserCredit);
 
                 SecondUserCreditRecord recordUp = new SecondUserCreditRecord();
                 recordUp.setUserId(secondUserCredit.getUserId());
-                recordUp.setPoints(50);
-                recordUp.setCurrentScoreCount(secondUserCredit.getUserPoints() + 50);
+                recordUp.setPoints(8);
+                recordUp.setCurrentScoreCount(secondUserCredit.getUserPoints() + 8);
                 recordUp.setPointsType(9);
                 secondUserCreditRecordMapper.updateById(record);
             }