refactor: move slow performance tests to extra test suite

test/membership/group_integration_test.exs

@@ -79,6 +79,7 @@ defmodule Mv.Membership.GroupIntegrationTest do
     end
   end
 
+  @moduletag :slow
   describe "Query Performance" do
     test "preloading groups with members avoids N+1 queries", %{actor: actor} do
       # Create test data

test/mv_web/live/group_live/index_test.exs

@@ -114,6 +114,7 @@ defmodule MvWeb.GroupLive.IndexTest do
     end
   end
 
+  @moduletag :slow
   describe "performance" do
     test "page loads efficiently with many groups", %{conn: conn} do
       # Create multiple groups

test/mv_web/live/group_live/show_test.exs

@@ -219,6 +219,7 @@ defmodule MvWeb.GroupLive.ShowTest do
     end
   end
 
+  @moduletag :slow
   describe "performance" do
     test "member list is loaded efficiently (no N+1 queries)", %{conn: conn} do
       group = Fixtures.group_fixture()

test/mv_web/member_live/index_membership_fee_status_test.exs

@@ -238,6 +238,7 @@ defmodule MvWeb.MemberLive.IndexMembershipFeeStatusTest do
     end
   end
 
+  @moduletag :slow
   describe "performance" do
     test "loads cycles efficiently without N+1 queries", %{conn: conn} do
       fee_type = create_fee_type(%{interval: :yearly})

test/mv_web/member_live/index_test.exs

@@ -1775,6 +1775,7 @@ defmodule MvWeb.MemberLive.IndexTest do
       assert Enum.any?(boolean_fields_after, &(&1.name == "Newly Added Field"))
     end
 
+    @tag :slow
     test "boolean filter performance with 150 members", %{conn: conn} do
       system_actor = Mv.Helpers.SystemActor.get_system_actor()
       conn = conn_with_oidc_user(conn)