pub const SPARSE_FALLBACK_SCORE: f64 = 0.5;Expand description
Documented score returned when the profile has fewer
attempts than MIN_OBSERVATIONS_FOR_SCORING.
The value is 0.5 — neutral on the unit interval, with no
influence on the policy mapper. This is the “I have no
signal” default; downstream policy mapping treats it as
the no-op baseline so an unobserved target does not get
over-escalated.