fix(data): route all TrackRepository queries through soft-delete-filtered Query

DeepDrftData/Repositories/TrackRepository.cs

@@ -11,42 +11,39 @@ namespace DeepDrftData.Repositories;
 
 public class TrackRepository : Repository<DeepDrftContext, TrackEntity>
 {
-    private readonly DeepDrftContext _context;
-
     public TrackRepository(
         DeepDrftContext context,
         ILogger<Repository<DeepDrftContext, TrackEntity>> logger,
         IDbExceptionClassifier? classifier = null)
         : base(context, logger, classifier: classifier)
     {
-        _context = context;
     }
 
     // Lookup by vault entry key. The base Repository<> only exposes id-based queries, so this
-    // queries the DbSet directly. Returns null on miss (service wraps in ResultContainer).
+    // uses Query (soft-delete filtered) rather than the raw DbSet.
     public async Task<TrackEntity?> GetByEntryKeyAsync(string entryKey)
-        => await _context.Tracks.FirstOrDefaultAsync(t => t.EntryKey == entryKey);
+        => await Query.FirstOrDefaultAsync(t => t.EntryKey == entryKey);
 
     // Picks one track uniformly at random. Two round-trips (count, then a single offset row)
     // rather than ORDER BY random() so the database never sorts the whole table — the catalogue
     // is small today but this keeps the cost flat as it grows. Returns null when empty so the
-    // service surfaces a valid empty-library state, not an error. Queries the DbSet directly,
-    // mirroring GetByEntryKeyAsync, since the base Repository<> exposes only id-based reads.
+    // service surfaces a valid empty-library state, not an error. Uses Query (soft-delete
+    // filtered) so deleted tracks are never candidates.
     public async Task<TrackEntity?> GetRandomAsync(CancellationToken cancellationToken = default)
     {
-        var count = await _context.Tracks.CountAsync(cancellationToken);
+        var count = await Query.CountAsync(cancellationToken);
         if (count == 0)
             return null;
 
         var index = Random.Shared.Next(count);
-        return await _context.Tracks
+        return await Query
             .OrderBy(t => t.Id)
             .Skip(index)
             .Take(1)
             .FirstOrDefaultAsync(cancellationToken);
     }
 
-    // Paged query with optional filter predicates. Built directly off the DbSet rather than the
+    // Paged query with optional filter predicates. Built off Query (soft-delete filtered) rather than the
     // base GetPagedAsync(paging) overload, which takes no where-clause. The OrderBy expression and
     // direction ride in on the PagingParameters the manager already built, so sort + filter +
     // pagination compose. Filter predicates apply before sort and Skip/Take so TotalCount reflects
@@ -56,7 +53,7 @@ public class TrackRepository : Repository<DeepDrftContext, TrackEntity>
         TrackFilter? filter,
         CancellationToken ct = default)
     {
-        IQueryable<TrackEntity> query = _context.Tracks;
+        IQueryable<TrackEntity> query = Query;
 
         if (filter is not null)
         {
@@ -105,7 +102,7 @@ public class TrackRepository : Repository<DeepDrftContext, TrackEntity>
     // Distinct albums (non-null) with track counts and a representative cover key. The cover is the
     // first non-null ImagePath in the group; GroupBy + projection keeps it a single round-trip.
     public async Task<List<AlbumSummaryDto>> GetDistinctAlbumsAsync(CancellationToken ct = default)
-        => await _context.Tracks
+        => await Query
             .Where(t => t.Album != null)
             .GroupBy(t => t.Album!)
             .Select(g => new AlbumSummaryDto
@@ -123,7 +120,7 @@ public class TrackRepository : Repository<DeepDrftContext, TrackEntity>
 
     // Distinct genres (non-null) with track counts.
     public async Task<List<GenreSummaryDto>> GetDistinctGenresAsync(CancellationToken ct = default)
-        => await _context.Tracks
+        => await Query
             .Where(t => t.Genre != null)
             .GroupBy(t => t.Genre!)
             .Select(g => new GenreSummaryDto