Release v1.16.2

Fixed

• An explicit IJobsManager.Rehydrate() call that arrives just as a background drain finishes now starts a new pass. It used to be skipped, so newly interrupted jobs waited for the next call or a host restart (#68)
• A job step stopped before PerformStep runs (while waiting for a throttle slot, right after acquiring one, or before its work starts) now reports itself as stopped to its job exactly once, so the job completes its stop and runs OnStopped. Job steps that report this outcome themselves from a PerformWork override must remove that code, or the job counts the stop twice. A step whose grain deactivates without a stop request, for example on silo shutdown, still stays scheduled and resumes after restart (#69)