Добавлено управление сессиями

PlaylistShared.Api/Services/TrackRemovalLogService.cs

@@ -0,0 +1,22 @@
+using PlaylistShared.Api.Data;
+
+public class TrackRemovalLogService
+{
+    private readonly ApplicationDbContext _db;
+    public TrackRemovalLogService(ApplicationDbContext db) => _db = db;
+
+    public async Task LogRemovalAsync(Guid sharedPlaylistId, string trackId, Guid? removedByUserId, string sessionId)
+    {
+        var log = new TrackRemovalLog
+        {
+            Id = Guid.NewGuid(),
+            SharedPlaylistId = sharedPlaylistId,
+            TrackId = trackId,
+            RemovedByUserId = removedByUserId,
+            RemovedAtUtc = DateTime.UtcNow,
+            SessionId = sessionId
+        };
+        _db.TrackRemovalLogs.Add(log);
+        await _db.SaveChangesAsync();
+    }
+}