完善 eventbus 多个实例之间重试时的数据隔离

src/Pole.EventStorage.PostgreSql/PostgreSqlEventStorage.cs

@@ -83,7 +83,10 @@ $"UPDATE {tableName} SET \"Retries\"=@Retries,\"ExpiresAt\"=@ExpiresAt,\"StatusN
                 $"SELECT * FROM {tableName} WHERE \"Retries\"<{producerOptions.MaxFailedRetryCount} AND \"Added\"<'{fourMinAgo}' AND  \"StatusName\"='{EventStatus.Pending}' for update skip locked LIMIT 200;";
 
             var result = new List<EventEntity>();
-            using var connection = new NpgsqlConnection(options.ConnectionString);
+            using (var connection = new NpgsqlConnection(options.ConnectionString))
+            {
+                using (var transaction = await connection.BeginTransactionAsync())
+                {
                     var reader = await connection.ExecuteReaderAsync(sql);
                     while (reader.Read())
                     {
@@ -97,9 +100,11 @@ $"UPDATE {tableName} SET \"Retries\"=@Retries,\"ExpiresAt\"=@ExpiresAt,\"StatusN
                             StatusName = reader.GetString(7)
                         });
                     }
-
+                    await transaction.CommitAsync();
                     return result;
                 }
+            }
+        }
 
         public async Task<bool> StoreMessage(EventEntity eventEntity, object dbTransaction = null)
         {