Describe the bug

a field named id in an embeddable is replaced by _id on fetch fromt he db.

See thread on slack https://mikroorm.slack.com/archives/CFSAF8DEX/p1700485119660259

Reproduction

mikro-orm/reproduction#2

What driver are you using?

@mikro-orm/mongodb

MikroORM version

6 rc1

Node.js version

20

Operating system

osx

Validations

• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion or join our Slack.
• The provided reproduction is a minimal reproducible example of the bug.