feat: add library scanning mechanic

Program.cs

@@ -70,6 +70,7 @@ builder.Services.AddHttpLogging();
 
 var app = builder.Build();
 bool shutdown = false;
+bool scanNeeded = false;
 if (args.FirstOrDefault() is not null)
 {
 	// Handle CLI if arguments have been passed.
@@ -89,6 +90,7 @@ using (IServiceScope scope = app.Services.CreateScope())
 	GeneralUseHelpers  guhf = scope.ServiceProvider.GetRequiredService<GeneralUseHelpers>();
 	Seeder           seeder = new(db, guhf);
 	shutdown = seeder.Seed();
+	if (!shutdown) scanNeeded = await seeder.ScanPrefetchAsync();
 }
 if (shutdown) return;