This DBIx::Class component can be used to automatically insert a
message digest of selected columns. By default DigestColumns will
use Digest::MD5 to insert a 128-bit hexadecimal message digest of
the column value.

The length of the inserted string will be 32 and it will only
contain characters from this set: '0'..'9' and 'a'..'f'.

If you would like to use a specific digest module to create your
message digest, you can set "digest_algorithm":