- StockManager: coerce lot_number/serial_number to trimmed string (fixes
Array-to-string warnings); validate quantity > 0 on insert; tighten
transfer pair lookup to match in/out side by column value
- PostingWindowGuard: strip time component from datetime strings before
date-format validation
- docs/tests/doc_flow_test.php: 32-assertion document flow suite covering
Stock In create + approve, Sales Order draft/confirm, Invoice from Order
(with duplicate-block check), PO create/confirm, Quotation create, and
usage increment wiring check; all 32/32 PASS against wms_codex_test
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
