v1.6.7

v1.6.7 — algorithm honesty release + 4 follow-up fixes

Strip 2023-leak claims that were not present in the May 15 2026 xai-org/x-algorithm
re-release. Add 3 missing scorer terms (not_dwelled, quoted_vqv, cont_click_dwell_time).
Replace fabricated weight magnitudes with honest 'historical 2023 estimate' framing.
Fix 'track status' SQLite TEXT-affinity crash and home-timeline null-body crash.
5 new regression tests prevent reintroduction of the false claims.

Detailed audit: 5 independent agents (3 Claude Opus + 2 Codex GPT-5.5)
reviewed xmaster against the May 15 2026 source. GPT-5.5 Pro meta-reviewed
the findings. Verified end-to-end by 5 more subagents before release.