Move rule.disposition-ladder into content/lore/mechanics.md and delete the
Duncarrow scaffolding (source + 23 generated JSON). Remove the redundant
test_duncarrow.py (routing/secrecy already covered by test_emit.py synthetic
fixtures); repoint a cosmetic slug-test id.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HuHRPE7VfppUJEaoGBEUqZ
