CREATE TABLE lead_filter_metrics (
    lead_id INT UNSIGNED NOT NULL,
    ir_margin_available DECIMAL(15,2) NULL,
    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
    updated_at DATETIME NULL DEFAULT NULL ON UPDATE CURRENT_TIMESTAMP,
    PRIMARY KEY (lead_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;