WA-NEW-008: Update PasswordReset error-copying for Rails 7 ActiveModel::Errors API

[jhill]

Goal: Remove Rails 6.1 deprecation warning and ensure compatibility with Rails 7 where ActiveModel::Errors yields Error objects instead of [attr, message] pairs.

Scope: Update core/app/models/workarea/user/password_reset.rb to iterate user.errors.each do |error| and copy error.attribute/error.message.

Verify: bundle exec ruby -Icore/test core/test/models/workarea/user/password_reset_test.rb (no deprecation warning in output)
Branch pattern: wa-new-008-*
PR target: next

[kitcommerce]

Implemented on branch wa-new-008-passwordreset-errors (commit 65ba58c): make error-copying compatible with Rails 7 ActiveModel::Errors (ActiveModel::Error objects) while still supporting older [attr, message] iteration.

Verify: bundle exec ruby -Icore/test core/test/models/workarea/user/password_reset_test.rb.

[kitcommerce]

Heads up: this issue is still OPEN but has label status:done. If the work is truly complete/merged, we should close the issue (or swap the label back to status:ready/in-progress). Let me know if you'd like me to propose the exact cleanup (close vs relabel) once we confirm the related commit/PR.

[kitcommerce]

Label corrected to status:in-progress (PR already open: #632).