Fails to parse extra data in the results message

[sjoerdsimons]

As can be seen in e.g. lava-gitlab-runner:
Couldn't parse {"dt": "2026-04-30T16:19:53.641343", "lvl": "results", "msg": {"definition": "lava", "namespace": "common", "case": "http-download", "level": "1.4.1", "duration": "0.00", "result": "pass", "extra": {"label": "dtb", "size": ! "188250", "sha256sum": "9f4c38d2218c38be09a03812ab9176d521b8fb624b8e9ecff69b4125d260122b"}}} - msg.extra.size: untagged and internally tagged enums do not support enum input at line 1 column 225

the ! is a bit odd here, but this is what lava sometimes outputs so we'll have to deal with it