CREATE TABLE inventories (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(255) NOT NULL,
    description TEXT,
    started_by INT,
    started_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    closed_at TIMESTAMP NULL,
    status ENUM('offen', 'abgeschlossen') DEFAULT 'offen',
    kommentar TEXT,
    FOREIGN KEY (started_by) REFERENCES users(id) ON DELETE SET NULL,
    INDEX idx_started_by (started_by),
    INDEX idx_status (status),
    INDEX idx_started_at (started_at),
    INDEX idx_closed_at (closed_at)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;