업데이트 필요한 이슈를 가져오는 논리 추가.

Services/AppDbService.cs

@@ -203,5 +203,23 @@ public class AppDbService
             throw;
         }
     }
+
+    public async Task<List<JiraIssue>> GetUnpublishedJiraIssuesAsync(CancellationToken ct = default)
+    {
+        try
+        {
+            var unpublishedIssues = await _db.JiraIssues
+                .Where(ji => ji.Published < ji.Updated)
+                .ToListAsync(ct);
+
+            _log.Information("Found {count} unpublished Jira issues", unpublishedIssues.Count);
+            return unpublishedIssues;
+        }
+        catch (Exception ex)
+        {
+            _log.Error(ex, "Failed to get unpublished Jira issues");
+            throw;
+        }
+    }
     #endregion Table: JiraIssues
 }