Function usage

src/utils/__tests__/cacheStats.test.ts:159–165

(input: number, create: number, read: number)

// ---------------------------------------------------------------------------

function usage(input: number, create: number, read: number): CacheUsage {
  return {
    input_tokens: input,
    cache_creation_input_tokens: create,
    cache_read_input_tokens: read,
  }
}

// ---------------------------------------------------------------------------
// computeHitRate