## Summary
- Makes Stripe Terminal card payment intents always use 25% moms in the
API, independent of any client-supplied `tax_percentage`.
- Updates amount calculation, metadata persistence, stored-intent reuse
matching, the authoritative OpenAPI contracts, and operation-specific
Writerside outputs.
- Prevents double charging and false order closure across stale,
concurrently succeeded, partially recorded, or mismatched intents.
- Serializes payment create/capture/closure with order-item changes and
every order-to-invoice-collection reassignment through shared database
locks.
- Converts expected lock contention and reconciliation cases into
deliberate 409 responses.
## Exact-head evidence
Current head: `3a0f70d315a94d2efe586a2188d2c54f8ff11cd4`
- PHP syntax passed for all changed runtime files.
- Focused Orders suite: **42 tests / 293 assertions passed**.
- `git diff --check` passed.
- Fresh exact-head Tests and Qodana are running.
- Every Codex finding has a concrete reply; a fresh exact-head review is
requested below.
## Safety behavior
- Caller-controlled VAT is absent from request contracts; fixed 25% moms
is server-owned.
- A succeeded payment is preserved, requires the full expected
`amount_received`, and cannot close a changed/mismatched or
already-claimed collection.
- A compatible partially recorded Stripe closure is completed
idempotently; conflicting partial state fails closed for manual
reconciliation.
- Every cancellation/delete caller honors a concurrent-success result
and never falsely reports a completed payment as cleared.
- Price changes and invoice-collection reassignment share the payment
lock through validation, capture, post-capture reload, and closure.
- Reader changes are persisted only for reusable matching intents, so
stale intent cancellation targets the original terminal.
- Accepted legacy succeeded intents normalize stored tax to 25% before
response construction.
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Co-authored-by: Jeppe Bundgaard <jb@truckwash.dk>
