feat(invoices): add line_items extraction and normalization for invoice parsing

changelog.md

@@ -1,5 +1,14 @@
 # Changelog
 
+## 2026-01-20 - 1.16.0 - feat(invoices)
+add line_items extraction and normalization for invoice parsing
+
+- Introduce ILineItem interface and add line_items array to IInvoice.
+- Add extractLineItems helper to normalize item fields (position, product, description, quantity, unit_price, total_price).
+- Include line_items in parsed invoice output and sample JSON in test, defaulting to [] when absent.
+- Update logging to include extracted line item count.
+- Clarify test instructions to extract items from invoice tables and skip subtotal/total rows.
+
 ## 2026-01-20 - 1.15.3 - fix(tests(nanonets))
 allow '/' when normalizing invoice strings in tests