-- A user's avatar is stored as journaled objects bound by role, mirroring
-- photo_objects. Keeping the binding in the ledger means garbage collection
-- preserves avatar blobs while they are referenced and reclaims them once the
-- avatar is replaced or removed.
CREATE TABLE IF NOT EXISTS user_avatar_objects (
    user_id   text NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    object_id text NOT NULL REFERENCES objects(id) ON DELETE RESTRICT,
    role      text NOT NULL CHECK (role IN ('avatar', 'avatar_small')),
    PRIMARY KEY (user_id, role)
);

CREATE INDEX IF NOT EXISTS user_avatar_objects_object_idx ON user_avatar_objects (object_id);