docs(kaizen): migrate gotchas to docs; curate FRICTION log (2026-06-10 review)
- New docs/testing/gotchas.md (nft iif/iifname, Molecule ansible_host,
apply-path coverage blind spot, render-nft-c pattern); pointer from ADR-008.
- claude-code-setup.md gains "Environment gotchas" (hooks-need-restart,
pre-commit stashes unstaged, rbw sync cache, zsh word-split).
- FRICTION.md restructured into Open signals + a decisions ledger; consumed
signals archived with where their resolution now lives.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
sjat
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