V3 license fields about openaq-api-v2 HOT 1 OPEN

CREATE SEQUENCE IF NOT EXISTS licenses_sq START 10;
CREATE TABLE IF NOT EXISTS licenses (
  licenses_id int PRIMARY KEY DEFAULT nextval('licenses_sq')
  , attribution_entities_id int NOT NULL REFERENCES entities
  , description text -- short descriptive summary
  , url text -- link to the actual text/pdf/copy of license
  , attribution_required boolean DEFAULT 't'
  , share_alike_required boolean DEFAULT 't'
  , commercial_use_allowed boolean DEFAULT 'f'
  , redistribution_allowed boolean DEFAULT 'f'
  , modification_allowed boolean DEFAULT 'f'
  , metadata jsonb
);