docs: merge CLAM hardening roadmap into REALITY_CHECK.md

Consolidated single source of truth:
- 11 issues (was 8), now includes CLAM integration gaps (#9),
  CausalCertificate as missing crown jewel (#10), and 31 unwired
  cognitive primitives (#11)
- Doc vs Code vs CLAM science cross-reference tables
- 8-week consolidated priority (was 4): weeks 1-4 architecture,
  weeks 5-8 CLAM integration
- Earned vs Aspirational section with honest assessment
- CLAM_HARDENING phases verified against actual codebase

https://claude.ai/code/session_01NocTBszN8LoR9Vrc7Tn4oF

Author: claude