BUG: Schema Metadata doesn't return if a schema is soft-deleted or not when querying with deleted=true

# What happened?

I am using Confluent Schema Registry API and when i query a soft deleted schema metadata using the lookupDeletedSchemas as true, I get the correct schema but the deleted field is null and there is no direct endpoint which returns it's correct status

# What did you expect to happen?
I expected the delete field to be populated or any other endpoint which offers this info in the response payload.

# What else do we need to know?
This can lead to confusion or we need to design big workarounds to determine if a particular schema is soft deleted or not.