False positives flagging "someone new" and "are you new" to change to "knew"

> These are advanced topics for someone new to AI or Python.

Both "new" and "knew" are grammatical after indefinite pronouns.

Here's another context where "new" is grammatical after personal pronouns:
> Are you new to budgeting or want to start fresh?

Reproduce the reported false positives with “someone new” and “Are you new to budgeting or want to start fresh?”. Trace which grammar-checking rule suggests changing “new” to “knew”, then add coverage for both grammatical contexts. Done means Harper no longer flags either sentence incorrectly.

Written by the indexing model from the issue text.