-- The owner's administrative page (issue #102) renders these counters and
-- offers a control to clear them, deliberately shipped before the Sighting
-- feature (issue #103) that fills them, so a false mark never needs SQL
-- against production. Zero counters mean a trusted Reader.
ALTER TABLE readers ADD COLUMN sighting_agreements integer NOT NULL DEFAULT 0;
ALTER TABLE readers ADD COLUMN sighting_disagreements integer NOT NULL DEFAULT 0;