When multiple artists share the exact same name (e.g. 'The Teenagers'
US vs FR), the index fast path often has zero popularity for both,
causing the MB text relevance score to determine ordering. MB gave
the obscure US band score 100 vs the well-known FR band score 93,
so the wrong one ranked first.
Added disambiguateSameNameArtists(): after the name-match tier sort
groups exact matches at the top, it checks if the same-name block
has undifferentiated scores. If so, it fires a single targeted
ArtistPopularity POST with just those 2-6 MBIDs and re-sorts by
global listen count. The FR Teenagers (1.3M listens) now correctly
rank above the US Teenagers (23K listens).
This only fires when needed — most searches have no same-name
collisions and skip the check entirely.
yonlu
6adfd5a68c