bugfix: handle repeated submission review access gracefully

[kopfduenger]

This improves the submission flow for already-submitted articles.

Instead of returning a 404 when the submitting author revisits /submit/<id>/review/, Janeway now redirects them to the article status page. The author-facing status page was also expanded to show useful article metadata.

Validation:

• lando manage test submission passed
• targeted security tests for the new redirect behavior passed

Note:

• the broader security suite still reports one unrelated inconsistent test around submission_authorised_with_good_user