feat: store MAAD results as compact f32 rows#119

fix(web): check locality columns on address_maad_stats

fix(web): reject MAAD curves that disagree with their q grid

fix(netflow-db): require matching MAAD q grids in compare

docs: size the f32 comparison tolerance to the stored curve range

feat(web): read MAAD charts from compact f32 storage

docs: describe compact MAAD storage and f32 comparison

feat(netflow-db): store MAAD results as compact f32 rows