hml-validate: more magic constants
hml-validate: refactor constants
hml-validate: use constants
hml-validate: make sure outputs actually exist
hml-validate/utils: helper func to copy files by name
hml-validate/consts: namespace constants
hml-validate/validate: use namespace constants
hml-validate/validate: collect results in higgsml-output
hml-validate: refactor results collection