Feature
Added explicit subset type flags (base/relic/booklet) across all sets, powering the new set-page type tabs.
Explicit subset type flags
Added three independent insert_sets columns — is_base, is_relic, is_booklet — extending the is_autograph philosophy so the new set-page type tabs (Base / Insert / Relic / Autograph / Booklets) draw from explicit data rather than name-guessing.
Backfilled every subset across all sets: 158 base, 199 relic, 17 booklet, with 110 autograph+relic overlaps (the flags are independent — the UI's placement matrix handles promotion). is_autograph was left untouched.