refactor: add platform messenger contracts

Introduce platform-neutral PlatformKind, PlatformUser, PlatformGroup, and IPlatformMessenger contracts in GmRelay.Shared.

Route Telegram session schedule updates, direct notifications, interaction replies, and calendar export through TelegramPlatformMessenger while preserving existing Telegram behavior.

Bump version -> 2.0.1

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

@@ -1,8 +1,7 @@
 using Dapper;
 using Npgsql;
-using Telegram.Bot;
-using Telegram.Bot.Types;
 using GmRelay.Shared.Domain;
+using GmRelay.Shared.Platform;
 using GmRelay.Shared.Rendering;
 using GmRelay.Bot.Infrastructure.Telegram;
 
@@ -22,7 +21,7 @@ internal sealed record JoinSessionBatchDto(Guid BatchId, string Title, int? MaxP
 
 public sealed class JoinSessionHandler(
     NpgsqlDataSource dataSource,
-    ITelegramBotClient bot,
+    IPlatformMessenger messenger,
     ILogger<JoinSessionHandler> logger)
 {
     public async Task HandleAsync(JoinSessionCommand command, CancellationToken ct)
@@ -59,7 +58,7 @@ public sealed class JoinSessionHandler(
             if (batchInfo is null)
             {
                 await transaction.RollbackAsync(ct);
-                await bot.AnswerCallbackQuery(command.CallbackQueryId, "Сессия не найдена.", cancellationToken: ct);
+                await AnswerAsync(command.CallbackQueryId, "Сессия не найдена.", ct);
                 return;
             }
 
@@ -80,7 +79,7 @@ public sealed class JoinSessionHandler(
                 var alreadyText = existingRegistrationStatus == ParticipantRegistrationStatus.Waitlisted
                     ? "Вы уже в листе ожидания!"
                     : "Вы уже записаны!";
-                await bot.AnswerCallbackQuery(command.CallbackQueryId, alreadyText, cancellationToken: ct);
+                await AnswerAsync(command.CallbackQueryId, alreadyText, ct);
                 return;
             }
 
@@ -114,7 +113,7 @@ public sealed class JoinSessionHandler(
             if (inserted == 0)
             {
                 await transaction.RollbackAsync(ct);
-                await bot.AnswerCallbackQuery(command.CallbackQueryId, "Вы уже записаны!", cancellationToken: ct);
+                await AnswerAsync(command.CallbackQueryId, "Вы уже записаны!", ct);
                 return;
             }
 
@@ -143,20 +142,17 @@ public sealed class JoinSessionHandler(
 
             // 4. Перерисовываем сообщение
             var view = SessionBatchViewBuilder.Build(batchInfo.Title, batchSessions.ToList(), batchParticipants.ToList());
-            var renderResult = TelegramSessionBatchRenderer.Render(view);
-
-            await BatchMessageEditor.EditBatchMessageAsync(
-                bot,
-                chatId: command.ChatId,
-                messageId: command.MessageId,
-                text: renderResult.Text,
-                replyMarkup: renderResult.Markup,
+            await messenger.UpdateScheduleAsync(
+                new PlatformScheduleMessage(
+                    TelegramPlatformIds.Group(command.ChatId),
+                    view,
+                    TelegramPlatformIds.Message(command.ChatId, threadId: null, command.MessageId)),
                 ct);
 
             var callbackText = registrationStatus == ParticipantRegistrationStatus.Waitlisted
                 ? "Основной состав заполнен. Вы добавлены в лист ожидания."
                 : "Вы успешно записаны!";
-            await bot.AnswerCallbackQuery(command.CallbackQueryId, callbackText, cancellationToken: ct);
+            await AnswerAsync(command.CallbackQueryId, callbackText, ct);
         }
         catch (Exception ex)
         {
@@ -169,7 +165,10 @@ public sealed class JoinSessionHandler(
             var errorText = transactionCommitted
                 ? "Регистрация сохранена, но не удалось обновить сообщение расписания."
                 : "Произошла ошибка при регистрации.";
-            await bot.AnswerCallbackQuery(command.CallbackQueryId, errorText, cancellationToken: ct);
+            await AnswerAsync(command.CallbackQueryId, errorText, ct);
         }
     }
+
+    private Task AnswerAsync(string callbackQueryId, string text, CancellationToken ct) =>
+        messenger.AnswerInteractionAsync(new PlatformInteractionReply(callbackQueryId, text), ct);
 }