both generators ran N sequential queries per artist/album.
rewritten with ROW_NUMBER() OVER (PARTITION BY ...) to get per-group
limits in a single round-trip, preserving existing semantics:
- comfortGenerator: up to 2 tracks per artist (was 20 queries → 1)
- deepDiveGenerator: up to 5 tracks per album (was 20 queries → 1)
kami