feat: expose underlying base url

Author: ikesnowy

src/Cnblogs.DashScope.Core/DashScopeClientCore.cs

@@ -32,6 +32,9 @@ public DashScopeClientCore(HttpClient httpClient)
         _httpClient = httpClient;
     }
 
+    /// <inheritdoc />
+    public Uri? BaseAddress => _httpClient.BaseAddress;
+
     /// <inheritdoc />
     public async Task<ModelResponse<TextGenerationOutput, TextGenerationTokenUsage>> GetTextCompletionAsync(
         ModelRequest<TextGenerationInput, ITextGenerationParameters> input,

src/Cnblogs.DashScope.Core/IDashScopeClient.cs

@@ -5,6 +5,11 @@
 /// </summary>
 public interface IDashScopeClient
 {
+    /// <summary>
+    /// Get the underlying api gateway address.
+    /// </summary>
+    Uri? BaseAddress { get; }
+
     /// <summary>
     /// Return textual completions as configured for a given prompt.
     /// </summary>