dev.knotless.getRunOutput

What a running check's steps printed, as its runner sent it (dev.knotless.putRunOutput): the text after a cursor, the steps that ended and the one going, for a client that follows no server-sent events. The appview keeps the last megabyte of a run in memory while it runs, and a while after; the check's record keeps its log. With nothing new and the run going, it waits up to `wait` seconds for more. Answers as dev.knotless.getCheck does for the same viewer: anyone may read a public repository's, its members a private one's.