Add track status filter and counts, album track ids and bulk track deletion

GET /tracks/users/{userId} accepts repeated status values and returns the
albums each track belongs to. GET /tracks/users/{userId}/status-counts,
GET /albums/{id}/tracks/ids and DELETE /tracks with a list of track ids
are new.

backend/Core/Musify.Application/Tracks/Responses/UserTrackApplicationResponse.cs

@@ -0,0 +1,20 @@
+using Musify.Domain.ValueObjects;
+
+namespace Musify.Application.Tracks.Responses
+{
+    public record TrackAlbumReference(Guid Id, string Title);
+
+    public record UserTrackApplicationResponse(
+        Guid Id,
+        string Title,
+        string? Artist,
+        ProcessingStatus AudioStatus,
+        double Duration,
+        int ListensCount,
+        DateTime CreatedAt,
+        DateTime UpdatedAt,
+        long OwnerUserId,
+        IReadOnlyCollection<Genre> Tags,
+        bool IsExplicit,
+        IReadOnlyList<TrackAlbumReference> Albums);
+}