Author	SHA1	Message	Date
Paul Schneider	2dcbcd35b3	feat(invoicing): connect signed estimates and verified payment receipts ... Freeze invoice totals and parties, record offline receipts and verify completed PayPal transactions. Protect idempotence and concurrent balance updates; add migration, API client, documentation and tests. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>	2026-10-19 20:29:08 +01:00
Paul Schneider	5d03b2e477	feat(billing): model invoice payment balances and settlement ... Persist amounts due and paid, derive partial and full settlement, and protect balances during command updates. Add migration, focused tests and invoicing documentation. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>	2026-10-19 19:32:22 +01:00