-- Expose EnrichedTagScale in the tuning lab (#1520). Adds the enriched-tag
-- weight knob to the taste_tuning singleton so operators can dial how much
-- folksonomy tags (#1490) count vs raw ID3 genre. DEFAULT 0.5 backfills the
-- existing row and matches taste.DefaultConfig().EnrichedTagScale.
ALTER TABLE taste_tuning
    ADD COLUMN enriched_tag_scale double precision NOT NULL DEFAULT 0.5;
