ALTER TABLE users ADD COLUMN notification_prefs TEXT NOT NULL
	DEFAULT '{"blocking_questions":true,"questions":false,"reports":false,"errors":false,"rate_limits":false}';

CREATE TABLE vapid_keys (
	id INTEGER PRIMARY KEY CHECK (id = 1),
	public_key TEXT NOT NULL,
	private_key TEXT NOT NULL
);

CREATE TABLE push_subscriptions (
	endpoint TEXT PRIMARY KEY,
	user_login TEXT NOT NULL REFERENCES users(login),
	p256dh TEXT NOT NULL,
	auth TEXT NOT NULL,
	subscriber TEXT NOT NULL,
	created_at TEXT NOT NULL
);