fix: credo warnings

test/membership/fuzzy_search_test.exs

@@ -69,7 +69,7 @@ defmodule Mv.Membership.FuzzySearchTest do
     ids = Enum.map(result, & &1.id)
     assert thomas.id in ids
     refute jane.id in ids
-    assert length(ids) >= 1
+    assert not Enum.empty?(ids)
   end
 
   test "empty query returns all members" do

test/seeds_test.exs

@@ -11,9 +11,9 @@ defmodule Mv.SeedsTest do
       {:ok, members} = Ash.read(Mv.Membership.Member)
       {:ok, custom_fields} = Ash.read(Mv.Membership.CustomField)
 
-      assert length(users) > 0, "Seeds should create at least one user"
-      assert length(members) > 0, "Seeds should create at least one member"
-      assert length(custom_fields) > 0, "Seeds should create at least one custom field"
+      assert not Enum.empty?(users), "Seeds should create at least one user"
+      assert not Enum.empty?(members), "Seeds should create at least one member"
+      assert not Enum.empty?(custom_fields), "Seeds should create at least one custom field"
     end
 
     test "can be run multiple times (idempotent)" do