CREATE TABLE IF NOT EXISTS drivers (
    id SERIAL PRIMARY KEY,
    user_id INT NOT NULL,
    full_name VARCHAR(255) NOT NULL,
    phone_number VARCHAR(255) NOT NULL,
    vehicle_details TEXT,
    approval_status VARCHAR(50) NOT NULL DEFAULT 'pending', -- pending, approved, rejected
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
);