CREATE TABLE IF NOT EXISTS client_notes (
    id INT AUTO_INCREMENT PRIMARY KEY,
    client_id INT NOT NULL,
    coach_id INT NOT NULL,
    note TEXT NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (client_id) REFERENCES clients(id) ON DELETE CASCADE,
    FOREIGN KEY (coach_id) REFERENCES coaches(id) ON DELETE CASCADE
);