test(bf-1wczm): unmapped.rs test module execution report

- Ran cmap_unmapped_glyphs.rs test module (TH-05 unmapped glyph assertions)
- All 7 tests passed successfully
- No hangs or timeouts detected
- Tests verify unmapped glyph name handling (.notdef, .null, g-series)
- Output captured to notes/bf-1wczm-unmapped.log
- Summary documented in notes/bf-1wczm-unmapped-summary.md

Closes bf-1wczm

notes/bf-1wczm-unmapped-summary.md

@@ -0,0 +1,46 @@
+# Test Execution Summary: unmapped.rs Test Module
+
+## Bead ID
+bf-1wczm
+
+## Date Run
+2026-07-06
+
+## Tests Executed
+Test module: `cmap_unmapped_glyphs.rs` (TH-05 unmapped glyph assertions)
+
+## Command Used
+```bash
+cargo test -p pdftract-core --test cmap_unmapped_glyphs -- --test-threads=1
+```
+
+## Test Results
+- **Total tests run:** 7
+- **Passed:** 7
+- **Failed:** 0
+- **Ignored:** 0
+- **Status:** PASS ✓
+
+## Tests Passed
+1. `test_cmap_multiple_mappings_with_unmapped_check` - Verifies CMAP handles multiple character mappings while checking unmapped glyphs
+2. `test_cmap_range_mapping_with_unmapped_awareness` - Tests range mapping with unmapped glyph awareness
+3. `test_cmap_unmapped_glyph_skip` - Basic structural test for unmapped glyph name identification
+4. `test_differences_overlay_consecutive_with_unmapped_filtering` - Tests consecutive differences overlay with unmapped filtering
+5. `test_differences_overlay_filters_all_g_series_unmapped` - Verifies all g-series glyphs are filtered as unmapped
+6. `test_differences_overlay_filters_null_glyph` - Tests .null glyph is properly filtered
+7. `test_differences_overlay_filters_unmapped_glyphs` - Tests unmapped glyph filtering in differences overlay
+
+## Completion Status
+✓ **Test module completed successfully** - No hangs detected, all tests terminated cleanly.
+
+## Exit Code
+0 (success)
+
+## Runtime
+< 1 second
+
+## Notes
+- All tests in the unmapped glyph assertion module (TH-05) passed
+- No hangs or timeouts observed
+- Tests verify correct handling of unmapped glyph names (.notdef, .null, g000-fff series)
+- Test module is isolated and runs independently without issues