s the public interest's principal champion. And when the parties are mutually interested in secrecy, the judge is its only champion. Binh Hoa Le v. Exeter Fin. Corp.. 990 F.3d 410. 421 (5th Cir. 2021) (footnote omitted). 17 Federal Rule of Criminal Procedure 6(e)(2)(B) reads: B) Unless these rules provid