Fix Credo Readability (strict)

- Max line length, implicit try, alias order, zero-arity defs
- String sigils, long comments split; redundant blank lines fixed

test/mv_web/live/group_live/integration_test.exs

@@ -14,8 +14,8 @@ defmodule MvWeb.GroupLive.IntegrationTest do
   import Ash.Expr
   use Gettext, backend: MvWeb.Gettext
 
-  alias Mv.Membership
   alias Mv.Fixtures
+  alias Mv.Membership
 
   describe "complete workflow" do
     test "create → view via slug → edit → view via slug (slug unchanged)", %{