dev.knotless.putRunOutput

Sends the appview what a check's steps printed since the runner last sent, for the pages following the check while it runs: the dev.knotless.check record says nothing of a run until it ends. Only whole lines are sent, with the run's secrets masked as its log's are. The appview keeps the tail of each run in memory, never for good: the record's log is what is kept. Only the runner that files the check may send its output, and an appview holding as many runs as it keeps, or as many of the caller's, refuses more until some end. Requires a service token from the caller's PDS, audience the appview's DID, for this method.