refactor(system): 优化租户超级管理员字段命名

- 将Tenant实体中的超级管理员用户ID字段名从superAdminUserId修改为ownerId
- 更新字段的Schema描述，将“超级管理员用户ID”改为“超级管理员UID”
- 修改TenantMapper.xml中关联查询SQL对应的字段别名为ownerId以保持一致
- 保持原有逻辑和功能不变，提升字段命名语义清晰度

src/main/java/com/gxwebsoft/common/system/entity/Tenant.java

@@ -104,9 +104,9 @@ public class Tenant implements Serializable {
   @TableField(exist = false)
   private String phone;
 
-  @Schema(description = "超级管理员用户ID")
+  @Schema(description = "超级管理员UID")
   @TableField(exist = false)
-  private Integer superAdminUserId;
+  private Integer ownerId;
 
   @Schema(description = "管理地址")
   @TableField(exist = false)

src/main/java/com/gxwebsoft/common/system/mapper/xml/TenantMapper.xml

@@ -5,7 +5,7 @@
     <!-- 关联查询sql -->
     <sql id="selectSql">
         SELECT a.*,b.company_name,b.company_logo as logo,b.admin_url,b.domain,b.free_domain,
-               u.phone,u.username,u.user_id as superAdminUserId
+               u.phone,u.username,u.user_id as ownerId
         FROM sys_tenant a
         LEFT JOIN sys_company b ON a.tenant_id = b.tenant_id
         LEFT JOIN gxwebsoft_core.sys_user u ON u.tenant_id = a.tenant_id AND u.is_super_admin = 1 AND u.deleted = 0