docs: add v1.0.0 final launch readiness validation report

Complete validation report confirming:
- All 3 blocking issues resolved (100%)
- Release agent: validation passed
- Meta agent: 40 files processed successfully
- Markdown linting: 0 errors (fixed 80+ files)
- JavaScript linting: 43 warnings (deferred Phase 2)
- YAML linting: 0 errors
- Git repository: committed and clean

Includes:
- Complete issue analysis with root causes
- Step-by-step fix instructions
- Time metrics (81% faster than estimated)
- Final sign-off checklist
- Phase 2 planning
- Risk assessment (all mitigated)
- Supporting documentation references

Status: ✅ READY FOR v1.0.0 RELEASE

Author: ashleyshaw