Studio admins can now define registration questions that every new student
answers as a required second step during signup, with each student's answers
shown under a "Registration Information" section in the admin.
Extends the existing Registration domain: us_questions gains a scope column
(offering | account) and a nullable offering_id, and account answers reuse
us_question_answers with registration_type = 'account'. Authoring reuses the
Offerings -> Questions page via an "Account signup" scope (studio-admin only).
The registration form becomes two steps (progressive enhancement via
assets/js/register.js; works without JS); required answers are validated before
the account is created and apply to all signup paths (invite, group link,
self-approval). StudentHistory::registrationInfo() powers the admin section.
Bumps the plugin version to 1.1.0 so dbDelta runs the schema migration.
Closes#90
Co-Authored-By: Claude Opus 4.8 <[email protected]>
