Add the full buyer-side supplier invoice reconciliation workflow:
- Include the new `stock_purchases.match_and_receive_from_invoice` MCP tool for deterministic PO-invoice matching
- Create core matching service with strict, rule-based line matching (sku → supplier_sku → description overlap)
- Support dry-run default mode to validate matches before committing
- Add automatic attachment handling with standard `supplier_invoice_*` naming convention
- Add full test suite for the matching logic
- Update documentation and agent skill profile to document the new tool and workflow
Pre-existing test failures (3 total) are unrelated to this change.
60d320411d
