315d15afd4
- 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).