- Add backend/__tests__/integration/incomingInvoiceRebill.test.js (8 tests):
disposition state machine, per-event PENDING pool, passthrough-no-markup,
unwindBilledLine recompute, INVOICE_LOCKED on an issued invoice, and
re-categorisation transitions. The invoice-MINTING paths can't run inside an
outer transaction on SQLite (createInvoice's sequence claim deadlocks on the
held write lock) — covered by buildInboundLineItem unit tests + discountLineItems
instead; documented in the test.
- Move logActivity out of the categorize/rebill/bundle transactions. It writes
via the global db; inside a transaction a second write connection deadlocks on
a SQLite-backed install (also affected SQLite-prod, not just tests).
- Fix bill-editor vat_code reload: transformInvoice (adminInvoices.js) dropped
vatCode, so the editor fell back to rate-matching and lost a custom-rate code
on edit. Now returns vatCode: i.vat_code.
- Rewrite docs/accounting-inbound-invoices.md to the current implementation
(IR-vs-Expenses split, re-categorise + unwind, cadence-aware re-bill / pending
pool, passthrough-at-cost, migrations 122-132, rasterised preview, tax/ledger/VAT).