-- A user's profile picture: one already-cropped, re-encoded 256x256 PNG per
-- user. Kept in Postgres rather than on a volume so every replica serves it and
-- the pg_dump backup covers it. updated_at is in milliseconds, not seconds like
-- the other timestamps, because it doubles as the cache-busting version of the
-- image URL and a re-upload within the same second must change it.

CREATE TABLE user_avatars (
    user_id bigint PRIMARY KEY REFERENCES users(id) ON DELETE CASCADE,
    data bytea NOT NULL,
    updated_at bigint NOT NULL
);