add round search by id

tournaments/admin.py

@@ -50,6 +50,7 @@ class TeamScoreAdmin(admin.ModelAdmin):
 class RoundAdmin(admin.ModelAdmin):
     list_display = ['tournament', 'name', 'index', 'parent']
     list_filter = [SimpleTournamentListFilter, SimpleIndexListFilter]
+    search_fields = ['id']
 
 class PlayerRegistrationAdmin(admin.ModelAdmin):
     list_display = ['first_name', 'last_name', 'licence_id', 'rank']