Document that all 73 unmapped glyph assertions have been verified:
- Breakdown by file: unmapped.rs (9), encoding.rs (63), resolver.rs (1)
- All three files checked and verified
- Test suite passes (cites bf-60vlq test run)
- No generic messages remain
- Cross-references message catalog (notes/bf-4kbre-messages.md)
- Commit hashes documented (9c0f18c1, 1beffa5a, 41479906, 459f5add)
- Parent bead bf-5dopl ready to close
Closes bf-39k8e.
