[Daily export script] convert climb id to UUID format

[vnugent]

When export climb object to json, we need to convert climbs._id to uuid format.

Tips:

• Exporter: https://github.com/OpenBeta/openbeta-graphql/blob/develop/src/db/export/json/async-file.processor.ts#L25
• Export command: yarn export-prod

I think the fix may be as simple as setting MUUID mode to 'relaxed', eg const mUUID = MUUID.mode('relaxed')
See https://github.com/cdimascio/uuid-mongodb