feat(openai): 新增异步任务查询相关接口

src/SKIT.FlurlHttpClient.Wechat.OpenAI/Extensions/WechatOpenAIClientExecuteAsyncExtensions.cs

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+using System;
+using System.Collections.Generic;
+using System.Net.Http;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using Flurl;
+using Flurl.Http;
+
+namespace SKIT.FlurlHttpClient.Wechat.OpenAI
+{
+    public static class WechatOpenAIClientExecuteAsyncExtensions
+    {
+        /// <summary>
+        /// <para>异步调用 [GET] /v1/async/fetch 接口。</para>
+        /// <para>REF: https://developers.weixin.qq.com/doc/aispeech/openapi/api/v1/task_fetch.html </para>
+        /// </summary>
+        /// <param name="client"></param>
+        /// <param name="request"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public static async Task<Models.AsyncFetchResponse> ExecuteAsyncFetchAsync(this WechatOpenAIClient client, Models.AsyncFetchRequest request, CancellationToken cancellationToken = default)
+        {
+            if (client is null) throw new ArgumentNullException(nameof(client));
+            if (request is null) throw new ArgumentNullException(nameof(request));
+
+            IFlurlRequest flurlReq = client
+                .CreateRequest(request, HttpMethod.Get, "v1", "async", "fetch")
+                .SetQueryParam("task_id", request.TaskId);
+
+            return await client.SendRequestWithJsonAsync<Models.AsyncFetchResponse>(flurlReq, data: request, cancellationToken: cancellationToken);
+        }
+    }
+}

src/SKIT.FlurlHttpClient.Wechat.OpenAI/Models/Async/AsyncFetchRequest.cs

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+using System;
+using System.Collections.Generic;
+
+namespace SKIT.FlurlHttpClient.Wechat.OpenAI.Models
+{
+    /// <summary>
+    /// <para>表示 [GET] /v1/async/fetch 接口的请求。</para>
+    /// </summary>
+    public class AsyncFetchRequest : WechatOpenAIRequest
+    {
+        /// <summary>
+        /// 获取或设置任务 ID。
+        /// </summary>
+        [Newtonsoft.Json.JsonIgnore]
+        [System.Text.Json.Serialization.JsonIgnore]
+        public string TaskId { get; set; } = string.Empty;
+    }
+}

src/SKIT.FlurlHttpClient.Wechat.OpenAI/Models/Async/AsyncFetchResponse.cs

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+using System;
+using System.Collections.Generic;
+
+namespace SKIT.FlurlHttpClient.Wechat.OpenAI.Models
+{
+    /// <summary>
+    /// <para>表示 [GET] /v1/async/fetch 接口的响应。</para>
+    /// </summary>
+    public class AsyncFetchResponse : WechatOpenAIResponse<AsyncFetchResponse.Types.Data>
+    {
+        public static class Types
+        {
+            public class Data
+            {
+                /// <summary>
+                /// 获取或设置任务状态。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("state")]
+                [System.Text.Json.Serialization.JsonPropertyName("state")]
+                public int State { get; set; }
+
+                /// <summary>
+                /// 获取或设置任务进度。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("progress")]
+                [System.Text.Json.Serialization.JsonPropertyName("progress")]
+                public string Progress { get; set; } = default!;
+
+                /// <summary>
+                /// 获取或设置任务耗时。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("cost")]
+                [System.Text.Json.Serialization.JsonPropertyName("cost")]
+                public string Cost { get; set; } = default!;
+
+                /// <summary>
+                /// 获取或设置导出任务的下载链接。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("url")]
+                [System.Text.Json.Serialization.JsonPropertyName("url")]
+                public string? Url { get; set; }
+
+                /// <summary>
+                /// 获取或设置接口访问令牌。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("success_skill_info")]
+                [System.Text.Json.Serialization.JsonPropertyName("success_skill_info")]
+                public IDictionary<string, object>? SuccessSkillMap { get; set; }
+            }
+        }
+    }
+}

test/SKIT.FlurlHttpClient.Wechat.OpenAI.UnitTests/ModelSamples/Async/AsyncFetchRequest.json

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+{}

test/SKIT.FlurlHttpClient.Wechat.OpenAI.UnitTests/ModelSamples/Async/AsyncFetchResponse.json

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+{
+    "code": 0,
+    "msg": "",
+    "data": {
+        "cost": "22496769ms",
+        "progress": "100/100",
+        "state": 2,
+        "url": "http://openai-75050.gzc.vod.tencent-cloud.com/40238_knowledge1588562918359.csv"
+    }
+}