Function computeDirection

packages/db/src/services/insights/utils.ts:77–86

(
  changePct: number,
  threshold = 0.05,
)

 * Determine direction based on change percentage
 */
export function computeDirection(
  changePct: number,
  threshold = 0.05,
): 'up' | 'down' | 'flat' {
  return changePct > threshold
    ? 'up'
    : changePct < -threshold
      ? 'down'
      : 'flat';
}

/**
 * Get end of day timestamp (23:59:59.999) for a given date.