[p][c] Use bytes instead of strings for hashes

4 jobs for 290_hashes_as_bytes
Status Job ID Name Coverage
  Test
passed #817
golang lint
Code lint

00:06:10

passed #823
mongo golang
Integration tests

00:02:07

passed #815
golang mongo strong
Unit tests

00:03:48

failed #816
golang mongo
Integration tests

00:02:33