Commission Invoices & Vendor Statements

Added 11

• Commission invoices per vendor and period (weekly, monthly, quarterly) from core vendor accounting: commission per order (marketplace_profit, as recorded by Vendor plans, category fees and commission add-ons), refunds as credit lines and vendor plan fees.
• Reconciliation per accounting transaction: every transaction is invoiced once; cancellations, refunds, deleted or declined transactions become correction lines on the next invoice.
• Automatic generation after each period (cron, cron URL with the core cron password, or admin/vendor panel pseudo-cron) and manual generation for a period and selected vendors; one invoice per vendor and period, one run at a time.
• Drafts with fee and correction lines (optionally charged to the vendor balance), notes and refresh from accounting; issue, paid, void; full and partial credit notes.
• Gapless numbering with prefixes, yearly restart, minimum digits and first numbers; numbers given on issue and never reused.
• Seller details and vendor billing details (prefilled from the vendor profile, editable by the administrator and optionally the vendor), snapshotted on issue.
• Tax line with rate and name, per-vendor treatment (standard, reverse charge, exempt) and rate, half-up rounding to the currency; optional tax charge to the vendor balance.
• Settlement modes: withheld from payouts (paid on issue when nothing is due) or paid by the vendor with payment terms.
• Core document template (Design > Documents, Twig 2 and 3), print view, PDF through the PDF documents add-on, e-mail to the vendor on issue with the PDF attached.
• Admin documents list with filters, bulk actions and CSV export of documents and lines; vendor panel page with downloads and billing details.
• Domain-bound license check and self-healing upgrades.

Tested on Multi-Vendor 4.17.2, Multi-Vendor 4.21.2. First release.