refactor: 移除自定义 HttpClientFactory，改用依赖注入的 IHttpClientFactory

Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Domain/AiGateWay/HttpClientFactory.cs

@@ -39,6 +39,12 @@ public static class HttpClientFactory
 
     private static readonly ConcurrentDictionary<string, Lazy<List<HttpClient>>> HttpClientPool = new();
 
+    /// <summary>
+    /// 高并发下有问题
+    /// </summary>
+    /// <param name="key"></param>
+    /// <returns></returns>
+    [Obsolete]
     public static HttpClient GetHttpClient(string key)
     {
         return HttpClientPool.GetOrAdd(key, k => new Lazy<List<HttpClient>>(() =>
@@ -70,4 +76,4 @@ public static class HttpClientFactory
             return clients;
         })).Value[new Random().Next(0, PoolSize)];
     }
-}
+}