Index recordings lack duration data (Length=0) because the explore
index only stores title/artist/popularity. When mergeIndexHits
prepended 15+ index recordings, they filled the maxResults cap and
pushed the MB recordings (which have real durations) off the list.
Removed recording merging from mergeIndexHits entirely. Index
artists and release groups are still merged (they carry popularity
data the MB results lack), but recordings don't benefit from index
merging — MB search already returns them with proper metadata.
yonlu
636020d1bc