* fix(rtc): look up pending before published tracks on resume so a moving track is not missed
* fix(rtc): rewrite the opus answer fmtp by key and drop the line when nothing remains
* chore(rtc): note why a track closed between the resume lookups reads as unknown
* test(rtc): keep the parked reader helper beside its only user in room_test
* fix(rtc): match the opus fmtp by exact payload type in the publisher answer