fix(bugcollect): 新 issue 创建时漏插 log_issue_users 导致 affectedUsers 偏低

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

xuqm-bugcollect-service/src/main/java/com/xuqm/bugcollect/service/LogService.java

@@ -116,6 +116,13 @@ public class LogService {
             issue.setRelease(item.release());
             issue = issueRepository.save(issue);
             isNew = true;
+            if (userId != null) {
+                LogIssueUserEntity iu = new LogIssueUserEntity();
+                iu.setIssueId(issue.getId());
+                iu.setUserId(userId);
+                iu.setFirstSeenAt(now);
+                issueUserRepository.save(iu);
+            }
         }
 
         LogIssueEventEntity eventEntity = new LogIssueEventEntity();