clientLedger now attaches allocations (docNo + amount) to each payment and
returns an outstanding[] list — issued invoices with outstandingPaise > 0
plus open (draft/sent/accepted) proformas, oldest-first by docNo. Read-only
extension over the existing settlement math (outstandingPaise, allocations);
no money/allocation logic changed. Mirrors the widened Payment/Ledger shapes
onto apps/hq-web/src/api.ts for the upcoming Payments tab.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Thomas Joise