TASK:默认积分分配改为平均分配；超级管理员可新增教育、企业管理员账户；组织成员使用积分时需要记录creditsUsage；试用用户初始50积分

src/main/java/com/ai/da/service/CreditsService.java

@@ -13,10 +13,6 @@ public interface CreditsService extends IService<CreditsDetail> {
 
     Boolean buyCredits(Long accountId, Float quantity);
 
-    void creditsIncrease(Long accountId, String event);
-
-    void creditsDecrease(Long accountId, String event);
-
     String getCredits(Long accountId);
 
     void creditsRefund(Long accountId, Integer quantity, String orderNo);