CREATE TABLE image_uploads (
    id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
    -- Discord user ID from the authenticated session, including guild-only users.
    uploader BIGINT UNSIGNED NOT NULL,
    url VARCHAR(512) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL UNIQUE,
    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
    INDEX image_uploads_uploader (uploader)
);