Cardi B defense gets boost in $24-million civil trial

Cardi B returned to the witness stand on Wednesday in a civil suit brought by a security guard who alleged that the rapper assaulted her — even scratching her with one of her nail extensions — in a 2018 incident in the hallway outside a Beverly Hills obstetrician’s office.

On Wednesday, the performer blasted the plaintiff, saying she is looking for a payout. Emani Ellis is seeking $24…