fix: migrate all memberships while migrating user

Author: zcesur

lib/algora/accounts/accounts.ex

@@ -376,6 +376,11 @@ defmodule Algora.Accounts do
       set: [user_id: new_user_id]
     )
 
+    Repo.update_all(
+      from(m in Member, where: m.user_id == ^old_user_id),
+      set: [user_id: new_user_id]
+    )
+
     Repo.update_all(
       from(c in Contributor, where: c.user_id == ^old_user_id),
       set: [user_id: new_user_id]