Embattled Steward Health Care chief Ralph de la Torre said Wednesday that he will not comply with a subpoena to testify at a Senate hearing next week on the collapse of his hospital system, setting up a showdown with lawmakers who are threatening to hold him in contempt.De la Torre did not rule out appearing before Congress eventually, but said through an attorney it would be “wholly inappropriate” to testify before his company emerges from the complex bankruptcy proceedings that have followed for-profit Steward’s spectacular downfall. And that process took a substantial step forward Wednesday, as a federal judge overseeing...