Update email sending method to return operation result

Modified SendAzureCommunicationAsync to return Task<EmailSendOperation> for result handling. Updated TestEmail.cs to log operation ID. Added default case to switch for unsupported sender types.

src/Moonglade.Function.Email/AzureCommunicationSender.cs

@@ -34,9 +34,9 @@ public async Task<EmailSendOperation> SendAsync(CommonMailMessage message)
 
 public static class CommonMailMessageExtensions
 {
-    public static async Task SendAzureCommunicationAsync(this CommonMailMessage message)
+    public static Task<EmailSendOperation> SendAzureCommunicationAsync(this CommonMailMessage message)
     {
         var sender = new AzureCommunicationSender();
-        await sender.SendAsync(message);
+        return sender.SendAsync(message);
     }
 }

src/Moonglade.Function.Email/TestEmail.cs

@@ -41,9 +41,12 @@ public async Task<IActionResult> Run(
                 case "smtp":
                     await message.SendAsync();
                     break;
+
                 case "azurecommunication":
-                    await message.SendAzureCommunicationAsync();
+                    var result = await message.SendAzureCommunicationAsync();
+                    logger.LogInformation($"AzureCommunication operation ID: {result.Id}");
                     break;
+
                 default:
                     throw new InvalidOperationException("Sender not supported");
             }