Task: Implement File:hash

1. Specify the field length in the database.

2. Add a helper

export async function calculateFileHash(file: File): Promise<string> {
  const arrayBuffer = await file.arrayBuffer()

  const hashBuffer = await crypto.subtle.digest('SHA-256', arrayBuffer)

  const hashArray = Array.from(new Uint8Array(hashBuffer))
  const hashHex = hashArray.map((b) => b.toString(16).padStart(2, '0')).join('')

  return hashHex
}

3. Add hash to FileWhereInput