The student-administration spec deferred three detail-view sections until
Payments landed. Adds them now: policy-acceptance history (title, version,
context, date), intake answers (label, answer, context), and — gated on
manage_billing — payment history with HST breakdown and receipt numbers.
New Auth\StudentHistory builds the display rows from per-student queries
added to AcceptanceRepository, AnswerRepository, and PaymentRepository;
the Payment model now carries created_at so unpaid rows still have a date.
Closes#69
Co-Authored-By: Claude Fable 5 <[email protected]>
