[Story]: Gap analysis against ISO/IEC 42001 clauses 4-10

## Summary
Perform a gap analysis of lightbridge's current AI governance practices against ISO/IEC 42001 clauses 4-10.

## Intent / Source of truth
This is the prerequisite scoping work before building the AI management system documentation. Part of [Epic] ISO/IEC 42001 certification path.

## Scope
- [ ] Clause-by-clause review (4 context, 5 leadership, 6 planning, 7 support, 8 operation, 9 performance evaluation, 10 improvement)
- [ ] Gap list per clause with owner and target remediation

## Out of scope
- Remediating the gaps themselves (tracked as g2s2/g2s3 and follow-on work)

## Verification
A reviewed gap-analysis document covering all seven clauses, with no clause left unassessed.

## Risk assessment
Low risk in isolation; the risk is downstream if this analysis is superficial and misses a load-bearing gap that surfaces during certification audit.

## AI Usage Declaration
Drafted with AI assistance during the 2026-08-13 cross-repo backlog consolidation and enterprise-readiness research. A human owns intent, verification and consequences.