Remove ExtraIds column and use OwnerId relationship for extras

- Remove ExtraIds property from BaseItemEntity and BaseItem
- Update RefreshExtras to query via OwnerId instead of cached ExtraIds
- Update GetExtras methods to query database via OwnerIds filter
- Add OwnerIds and ExtraTypes filter support to InternalItemsQuery
- Add filter handling in BaseItemRepository for new query options
- Update HasSpecialFeature/HasTrailer filters to use Extras relationship
- Add CleanupOrphanedExtras migration routine
- Add database migration to drop ExtraIds column

src/Jellyfin.Database/Jellyfin.Database.Implementations/Entities/BaseItemEntity.cs

@@ -118,8 +118,6 @@ public class BaseItemEntity
 
     public string? ProductionLocations { get; set; }
 
-    public string? ExtraIds { get; set; }
-
     public int? TotalBitrate { get; set; }
 
     public BaseItemExtraType? ExtraType { get; set; }

src/Jellyfin.Database/Jellyfin.Database.Providers.Sqlite/Migrations/20260113233500_DropExtraIdsColumn.cs

@@ -0,0 +1,36 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Jellyfin.Database.Providers.Sqlite.Migrations
+{
+    /// <inheritdoc />
+    public partial class DropExtraIdsColumn : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "ExtraIds",
+                table: "BaseItems");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<string>(
+                name: "ExtraIds",
+                table: "BaseItems",
+                type: "TEXT",
+                nullable: true);
+
+            migrationBuilder.UpdateData(
+                table: "BaseItems",
+                keyColumn: "Id",
+                keyValue: new Guid("00000000-0000-0000-0000-000000000001"),
+                column: "ExtraIds",
+                value: null);
+        }
+    }
+}

src/Jellyfin.Database/Jellyfin.Database.Providers.Sqlite/Migrations/JellyfinDbModelSnapshot.cs

@@ -207,9 +207,6 @@ namespace Jellyfin.Server.Implementations.Migrations
                     b.Property<string>("ExternalServiceId")
                         .HasColumnType("TEXT");
 
-                    b.Property<string>("ExtraIds")
-                        .HasColumnType("TEXT");
-
                     b.Property<int?>("ExtraType")
                         .HasColumnType("INTEGER");