- Fix test_differences_overlay_filters_null_glyph expected value: /Z instead of Z
- Update verification note with latest test results showing all 7 tests pass
- Normal glyphs presence assertions working correctly (A, B, space, C verified present)
Closes bf-3ayf6
Documented attempt to execute pdftract CLI with OCR on degraded-200dpi.pdf.
Found that OCR feature requires leptonica system dependencies not currently
available in NixOS environment. CLI invocation and fixture file are valid,
but compilation fails due to missing lept.pc.
Acceptance criteria:
- Command executes: PARTIAL (valid syntax, build fails due to dependencies)
- Process starts: FAIL (blocked by missing leptonica headers)
- OCR process begins: FAIL (build prevents execution)
This is an environmental limitation, not a code defect.
References: bf-3n62c
