This is the first part of a two-part column. The second part will be published on Tuesday.Act I in litigation about a $4 million legal malpractice claim was a battle in bankruptcy court about an unwritten exception to the Worker Adjustment and Retraining Notification Act for firings by a “liquidating fiduciary.”As debtor-in-possession in reorganization proceedings under Chapter 11 of the Bankruptcy Code, three affiliated companies referred to as “World Marketing” terminated hundreds of employees …