CREATE TABLE IF NOT EXISTS refresh_sessions (
    id TEXT PRIMARY KEY NOT NULL,
    user_id TEXT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    token TEXT NOT NULL UNIQUE,
    expires_at TEXT NOT NULL,
    created_at TEXT NOT NULL
);

CREATE INDEX IF NOT EXISTS idx_refresh_sessions_token ON refresh_sessions(token);
CREATE INDEX IF NOT EXISTS idx_refresh_sessions_user_id ON refresh_sessions(user_id);