gating.py: two-tier evidence bar (OQ5) — promote floor (frequency/sessions/
cost_impact) plus a stricter distribution-eligibility floor that sets a
promoted pattern to approved+distribution_ready vs provisional. Wired into
review() so thin approvals land provisional. bloat_warnings flags duplicate
and near-duplicate (same signal-type+locus) candidates (OQ6). [curate]/
[curate.gate] knobs in config.toml. 6 new tests; suite 64/64 green.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
