docs(bf-1hens): add verification note for forms_integration test

notes/bf-1hens.md

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+# bf-1hens: Verify forms_integration test compiles and runs
+
+## Task
+Confirm the forms_integration test module is fully integrated and functional.
+
+## Actions Taken
+1. Ran `cargo test -p pdftract-cli --test forms_integration`
+2. Verified compilation succeeded
+3. Verified test executed without errors
+
+## Results
+```
+running 6 tests
+test test_discover_pdf_fixtures ... ok
+test test_acroform_features ... ok
+test test_form_field_structure ... ok
+test test_forms_fixtures_discovery ... ok
+test test_extract_all_discovered_pdfs ... ok
+test test_xfa_detection ... ok
+
+test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+```
+
+## Acceptance Criteria Status
+- ✅ `cargo test forms_integration` compiles successfully
+- ✅ Test runs (executes, may pass or fail - compilation is what matters)
+- ✅ No compilation errors in the output
+
+## Notes
+The test module is located at `/home/coding/pdftract/crates/pdftract-cli/tests/forms_integration.rs`.
+The test includes 6 tests for PDF form field extraction and analysis:
+- PDF fixture discovery tests
+- AcroForm feature tests
+- Form field structure validation tests
+- XFA detection tests
+
+All tests passed successfully. The test framework is working correctly and ready for future fixture additions.