Updates the canonical current-state doc to reflect the Round-5
deliverables:
- "Last updated" header bumped to
"F1-F6d fixes + Round-5 N17+N18".
- § 5.10.3 Round-5 summary section added (cross-references
the new code-audit doc).
- § 6.5 per-fix summary table extended with the 4 N18 driver-
manager bug fixes (Q1, Q2+Bug4, S3, Bug5) and a row pointing
to the new `DRIVER-MANAGER-CODE-AUDIT-2026-07-27.md` for
the full audit context.
- § 7.1 References updated to list the new code-audit doc as
the primary Round-5 internal reference.
vasilito
f925ba0a32