fix: Add service_id to search fields instead of custom

Author: calvin-codecov

apps/codecov-api/core/admin.py

@@ -44,6 +44,7 @@ class RepositoryAdmin(AdminMixin, admin.ModelAdmin):
     search_fields = (
         "name",
         "author__username__exact",
+        "service_id__exact",
     )
     show_full_result_count = False
     autocomplete_fields = ("bot",)
@@ -84,19 +85,19 @@ def get_search_results(
         Search for repositories by name, service_id, author username, or repoid.
         https://docs.djangoproject.com/en/5.2/ref/contrib/admin/#django.contrib.admin.ModelAdmin.get_search_results
         """
-        # Default search is by name and author username (defined in `search_fields`)
+        # Default search is by name, author username, and service_id (defined in `search_fields`)
         queryset, may_have_duplicates = super().get_search_results(
             request,
             queryset,
             search_term,
         )
+        # Also search by repoid if the search term is numeric
         try:
             search_term_as_int = int(search_term)
         except ValueError:
             pass
         else:
             queryset |= self.model.objects.filter(repoid=search_term_as_int)
-            queryset |= self.model.objects.filter(service_id=search_term_as_int)
         return queryset, may_have_duplicates
 
     def has_add_permission(self, _, obj=None):