feat(#21): support selected telegram topics for schedules

Route new schedules to an existing forum topic when /newsession is sent inside one, create bot-owned topics only from the forum root, and keep group notifications/dashboard updates threaded to the stored topic.

Persist topic ownership so deletion only removes empty bot-created topics, add topic routing tests and smoke coverage, and bump release metadata to 1.14.0.

src/GmRelay.Bot/Features/Sessions/CreateSession/CancelSessionHandler.cs

@@ -14,6 +14,7 @@ public sealed record CancelSessionCommand(
     long TelegramUserId,
     string CallbackQueryId,
     long ChatId,
+    int? MessageThreadId,
     int MessageId);
 
 // DTOs for AOT compilation
@@ -29,7 +30,7 @@ public sealed class CancelSessionHandler(
     {
         await using var connection = await dataSource.OpenConnectionAsync(ct);
         await using var transaction = await connection.BeginTransactionAsync(ct);
-        
+
         // 1. Проверяем, что запрос делает управляющий данной группы.
         var session = await connection.QuerySingleOrDefaultAsync<CancelSessionInfoDto>(
             """
@@ -117,9 +118,14 @@ public sealed class CancelSessionHandler(
                 ct);
 
             await bot.AnswerCallbackQuery(command.CallbackQueryId, "Сессия отменена!", cancellationToken: ct);
-            
+
             // Опционально: написать отдельное сообщение в чат
-            await bot.SendMessage(command.ChatId, $"❌ <b>Внимание!</b> Сессия \"{System.Net.WebUtility.HtmlEncode(session.Title)}\" отменена.", parseMode: Telegram.Bot.Types.Enums.ParseMode.Html, cancellationToken: ct);
+            await bot.SendMessage(
+                chatId: command.ChatId,
+                messageThreadId: command.MessageThreadId,
+                text: $"❌ <b>Внимание!</b> Сессия \"{System.Net.WebUtility.HtmlEncode(session.Title)}\" отменена.",
+                parseMode: Telegram.Bot.Types.Enums.ParseMode.Html,
+                cancellationToken: ct);
 
             var mode = SessionNotificationModeExtensions.FromDatabaseValue(session.NotificationMode);
             if (mode.ShouldSendDirectMessages())

src/GmRelay.Bot/Features/Sessions/CreateSession/CreateSessionHandler.cs

@@ -144,14 +144,31 @@ public sealed class CreateSessionHandler(
                     transaction);
             }
 
-            int? messageThreadId = null;
-            if (message.Chat.IsForum)
+            var topicDestination = TelegramTopicRouting.ResolveNewScheduleDestination(
+                message.Chat.IsForum,
+                message.MessageThreadId);
+            var messageThreadId = topicDestination.MessageThreadId;
+            var topicCreatedByBot = topicDestination.TopicCreatedByBot;
+            if (topicDestination.ShouldCreateForumTopic)
             {
-                var topic = await botClient.CreateForumTopic(
-                    chatId: chatId,
-                    name: $"🎲 Игры: {title}",
-                    cancellationToken: cancellationToken);
-                messageThreadId = topic.MessageThreadId;
+                try
+                {
+                    var topic = await botClient.CreateForumTopic(
+                        chatId: chatId,
+                        name: $"🎲 Игры: {title}",
+                        cancellationToken: cancellationToken);
+                    messageThreadId = topic.MessageThreadId;
+                }
+                catch (Telegram.Bot.Exceptions.ApiRequestException ex)
+                    when (TelegramTopicRouting.IsMissingForumTopicRightsError(ex.Message))
+                {
+                    await transaction.RollbackAsync(cancellationToken);
+                    await botClient.SendMessage(
+                        chatId,
+                        TelegramTopicRouting.MissingForumTopicRightsMessage,
+                        cancellationToken: cancellationToken);
+                    return;
+                }
             }
 
             var batchId = Guid.NewGuid();
@@ -161,8 +178,8 @@ public sealed class CreateSessionHandler(
             {
                 var sessionId = await connection.ExecuteScalarAsync<Guid>(
                     """
-                    INSERT INTO sessions (batch_id, group_id, title, join_link, scheduled_at, status, thread_id, max_players)
-                    VALUES (@BatchId, @GroupId, @Title, @Link, @ScheduledAt, @Status, @ThreadId, @MaxPlayers)
+                    INSERT INTO sessions (batch_id, group_id, title, join_link, scheduled_at, status, thread_id, topic_created_by_bot, max_players)
+                    VALUES (@BatchId, @GroupId, @Title, @Link, @ScheduledAt, @Status, @ThreadId, @TopicCreatedByBot, @MaxPlayers)
                     RETURNING id;
                     """,
                     new
@@ -173,6 +190,7 @@ public sealed class CreateSessionHandler(
                         Link = link,
                         ScheduledAt = scheduledAt,
                         ThreadId = messageThreadId,
+                        TopicCreatedByBot = topicCreatedByBot,
                         MaxPlayers = parseResult.MaxPlayers,
                         Status = SessionStatus.Planned
                     },