Fetch one application

Safe to read aloud.

example: HV-QYFHW6M4D8

one of: ETHSOMDJIKEN

one of: draftawaiting_paymentpaidsubmittedunder_reviewapprovedrejectedcancelledexpired

The applicant’s own answers, keyed by the wizard’s field paths: `personal.*`, `passport.*`, `contact.*`, `travel.*`, `accommodation.*`, `purpose.*`, `host.*`, `family.*`, `employment.*`, `emergency.*`, plus a `documents` array. **Partial by design** — the wizard autosaves the whole object as the applicant types, so a draft holds only the fields filled in so far, and a `PATCH` merges rather than replaces. Which fields apply depends on the destination and on earlier answers. Unknown keys are accepted and ignored; `extensions` is the map that is validated strictly.

Answers the destination’s own form asks for and ours does not. Validated against the captured flow for this destination — an unrecognised key is refused, because a field the government will read is not a place to accept a typo. See `packages/reference`.

Everyone travelling with the applicant — the applicant is not in this list. Empty for a single-traveller application, which is every application created before groups existed. Set at creation and frozen with the price, because the party size is what the price is for.

The price agreed at creation, frozen. A later government fee change must never re-price an in-flight application, and a dispute months later has to be answerable from this row. `travellers` in here is the party size **including the lead**, and the fees are per person — the total is their product.

Optimistic concurrency token. Send the version you last saw on a PATCH.