Зависимости на контракты

backend/src/Contracts/Messaging/Application/Abstractions/IMessageQueryService.cs

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+using System;
+using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Knot.Contracts.Messaging.Application.Abstractions;
+
+public interface IMessageQueryService
+{
+    Task<List<MessageInfo>> GetAllMessagesAsync(CancellationToken cancellationToken);
+    Task<List<MessageInfo>> GetOrphanedMessagesAsync(HashSet<Guid> activeChatIds, CancellationToken cancellationToken);
+    Task DeleteMessagesAsync(List<Guid> messageIds, CancellationToken cancellationToken);
+}
+
+public record MessageInfo(Guid Id, Guid ChatId, bool IsDeleted, string? MediaUrl, List<MediaInfo>? Media);
+
+public record MediaInfo(string Url);

backend/src/Contracts/Messaging/Application/Abstractions/IUserStatsService.cs

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+using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Knot.Contracts.Messaging.Application.Abstractions;
+
+public interface IUserStatsService
+{
+    Task<Dictionary<Guid, UserStats>> GetStatsForUsersAsync(List<Guid> userIds, CancellationToken cancellationToken = default);
+}
+
+public record UserStats(int MessageCount, long StorageSize);