#3508 fix: Correctly load private key with passphrase in JWT-based authenticator Pull request opened by edgarrmondragon SSIA ## Summary by Sourcery Fix OAuth JWT authenticator handling of PEM private keys with optional passphrases and expand test coverage for JWT payload generation. Bug Fixes: • Correct loading and serialization of PEM private keys when a passphrase is configured in the OAuth JWT authenticator. Tests: • Update OAuth JWT authenticator tests to construct the authenticator via its public API and validate JWT audience along with payload contents. meltano/sdk