minBlendedScore=50 was too aggressive on the fast path where
non-indexed MB results get zero popularity (blended score ~35).
This killed all MB results that weren't in the explore index,
leaving only library/index artists.
New approach: two-tier filtering in filterAndCap:
1. minBlendedScore=25 — baseline filter for all artists
2. minZeroPopScore=50 — stricter filter for artists with NO LB
popularity data (HasPopularity=false)
HasPopularity is set by both reranking paths when an artist has
any listen count in the index or LB API. Shannon Hale (zero
listens, score 37) gets filtered by the zero-pop threshold.
Regular MB results that happen to not be in the index but do have
LB popularity pass the normal threshold.
yonlu
fc2a50e853