Mostly race condition fixes.
"winegstreamer: Do waits for samples on stream-specific work queues." works around a Gstreamer bug that I'll try to write a minimal reproducer for and submit to their bug tracker. For now, doing sample waits actually concurrently works around the problem.
"winegstreamer: Fixate caps in autoplug_continue_cb." so far I've only seen relevant when the source is a uridecodebin (in Proton), but I though it couldn't hurt to upstream it too.