Добавить remote-просмотр исходника карточки

RPC TelegramService.ReadSource + ISessionClient.GetMessageAsync, порт ITelegramGateway.ReadSourceAsync и провайдер TelegramSourceContentProvider в ядре; GET /api/cards/{id}/source догружает исходник у сервиса-владельца, в UI — кнопка «Обновить из источника». Медиа-посты пропускаются.

src/core/Deal.Infrastructure/Integrations/Services/GrpcTelegramClient.cs

@@ -278,6 +278,30 @@ public sealed class GrpcTelegramClient : ITelegramGateway
         }
     }
 
+    /// <inheritdoc />
+    public async Task<TelegramSourceContentDto> ReadSourceAsync(
+        string dialogId,
+        long msgId,
+        CancellationToken ct)
+    {
+        TenantId tenantId = RequireTenant();
+        try
+        {
+            ReadSourceReply reply = await CallAsync(
+                tenantId, TimeSpan.FromSeconds(CommandDeadlineSeconds), ct,
+                (client, options) => client.ReadSourceAsync(
+                    new ReadSourceRequest { DialogId = dialogId ?? string.Empty, MsgId = msgId }, options));
+            return new TelegramSourceContentDto(
+                reply.Found,
+                reply.HasText ? reply.Text : null,
+                reply.HasTime ? reply.Time : null);
+        }
+        catch (Exception exception)
+        {
+            throw TranslateTransportFailure(exception, tenantId, "read_source");
+        }
+    }
+
     /// <inheritdoc />
     public async Task<IReadOnlyList<TelegramDialogEntryDto>> SearchAsync(
         string query,

src/core/Deal.Infrastructure/Integrations/Services/LocalTelegramGateway.cs

@@ -67,6 +67,13 @@ public sealed class LocalTelegramGateway : ITelegramGateway
         CancellationToken ct)
         => Task.FromResult<IReadOnlyList<TelegramRecentMessageDto>>([]);
 
+    /// <inheritdoc />
+    public Task<TelegramSourceContentDto> ReadSourceAsync(
+        string dialogId,
+        long msgId,
+        CancellationToken ct)
+        => Task.FromResult(new TelegramSourceContentDto(false, null, null));
+
     /// <inheritdoc />
     public Task<IReadOnlyList<TelegramDialogEntryDto>> SearchAsync(
         string query,

src/core/Deal.Infrastructure/Integrations/Sources/TelegramSourceContentProvider.cs

@@ -0,0 +1,39 @@
+using System.Globalization;
+using Deal.Contracts.Integrations.Abstractions;
+using Deal.Contracts.Integrations.Models;
+using Deal.Modules.Cards.Application.Sources;
+
+namespace Deal.Infrastructure.Integrations.Sources;
+
+/// <summary>
+/// Провайдер содержимого исходника источника telegram: запрос к telegram-service по id сообщения.
+/// </summary>
+/// <param name="gateway">Порт-гейт к telegram-service.</param>
+public sealed class TelegramSourceContentProvider(ITelegramGateway gateway) : ISourceContentProvider
+{
+    private const string TelegramKind = "telegram";
+
+    /// <inheritdoc />
+    public string Kind => TelegramKind;
+
+    /// <inheritdoc />
+    public async Task<SourceContent?> LoadAsync(SourceRef source, CancellationToken ct)
+    {
+        if (!string.Equals(source.Kind, TelegramKind, StringComparison.OrdinalIgnoreCase))
+        {
+            return null;
+        }
+
+        string dialogId = source.OriginRef ?? string.Empty;
+        if (dialogId.Length == 0
+            || !long.TryParse(source.ExternalId, NumberStyles.Integer, CultureInfo.InvariantCulture, out long msgId))
+        {
+            return null;
+        }
+
+        TelegramSourceContentDto content = await gateway.ReadSourceAsync(dialogId, msgId, ct).ConfigureAwait(false);
+        return content.Found
+            ? new SourceContent { Text = content.Text }
+            : null;
+    }
+}

src/core/Deal.Infrastructure/ServiceCollectionExtensions.cs

@@ -3,12 +3,14 @@ using Deal.Infrastructure.Integrations.Abstractions;
 using Deal.Infrastructure.Integrations.Models;
 using Deal.Infrastructure.Integrations.Options;
 using Deal.Infrastructure.Integrations.Services;
+using Deal.Infrastructure.Integrations.Sources;
 using Deal.Infrastructure.Persistence;
 using Deal.Infrastructure.Persistence.Repositories;
 using Deal.Infrastructure.Security;
 using Deal.Infrastructure.Services;
 using Deal.Infrastructure.Tenancy;
 using Deal.Modules.Cards.Application.Abstractions;
+using Deal.Modules.Cards.Application.Sources;
 using Deal.Modules.Discovery.Application.Abstractions;
 using Deal.Modules.Kanban.Application.Abstractions;
 using Deal.Modules.Pipeline.Application.Abstractions;
@@ -56,6 +58,8 @@ public static class ServiceCollectionExtensions
 
         services.AddScoped<ICardStore, KanbanStore>();
 
+        services.AddScoped<ISourceContentProvider, TelegramSourceContentProvider>();
+
         services.AddScoped<IPipelineStore, PipelineStore>();
 
         services.AddScoped<IMlLearningStore, MlLearningStore>();