fix: create Telegram topics for template batches

Create a Telegram forum topic when Web creates a batch from a campaign template, persist thread ownership on the generated sessions, and send the batch schedule into that topic.

Bump version -> 3.1.1

tests/GmRelay.Bot.Tests/Infrastructure/Telegram/TelegramTopicIntegrationSmokeTests.cs

@@ -60,6 +60,19 @@ public sealed class TelegramTopicIntegrationSmokeTests
         Assert.Contains("ExternalThreadId", telegramMessenger, StringComparison.Ordinal);
     }
 
+    [Fact]
+    public async Task WebTemplateBatches_ShouldCreateAndPersistForumTopic()
+    {
+        var sessionService = await ReadRepositoryFileAsync("src/GmRelay.Web/Services/SessionService.cs");
+
+        Assert.Contains("GetChat", sessionService, StringComparison.Ordinal);
+        Assert.Contains("CreateForumTopic", sessionService, StringComparison.Ordinal);
+        Assert.Contains("thread_id, topic_created_by_bot", sessionService, StringComparison.Ordinal);
+        Assert.Contains("ThreadId = messageThreadId", sessionService, StringComparison.Ordinal);
+        Assert.Contains("TopicCreatedByBot = topicCreatedByBot", sessionService, StringComparison.Ordinal);
+        Assert.Contains("messageThreadId: messageThreadId", sessionService, StringComparison.Ordinal);
+    }
+
     private static async Task<string> ReadRepositoryFileAsync(string relativePath)
     {
         var directory = new DirectoryInfo(AppContext.BaseDirectory);