Prepared Seperation of Database components for future multi provider support

Jellyfin.Database/Jellyfin.Database.Implementations/ModelConfiguration/ActivityLogConfiguration.cs

@@ -0,0 +1,17 @@
+using Jellyfin.Data.Entities;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+
+namespace Jellyfin.Server.Implementations.ModelConfiguration;
+
+/// <summary>
+/// FluentAPI configuration for the ActivityLog entity.
+/// </summary>
+public class ActivityLogConfiguration : IEntityTypeConfiguration<ActivityLog>
+{
+    /// <inheritdoc/>
+    public void Configure(EntityTypeBuilder<ActivityLog> builder)
+    {
+        builder.HasIndex(entity => entity.DateCreated);
+    }
+}