The zone-shift and single-Pearson guards now assert that their matchers
find the correct shapes before concluding nothing else matches, and the
dense-read guard lists the streak's per-day existence probe with the
reason it stays bounded.
The /insights envelope (weight x BP, mood x BP, mood x weight, mood x
pulse, BP medication continuity) and the AI feature payload computed
their coefficients with an ungated Pearson that banded |r| above five
pairs, so five days of noise sloping the right way read as a strong
correlation there while every other surface refused the same points.
Both now use `significantPearsonCorrelation` (n >= 20 and p < 0.05,
through the engine's exact p-value), and the ungated function is gone.
The allowlist guard that tracked its remaining callers becomes a guard
that there is one Pearson implementation.
Marc-André Bombeck