Cached opentopia stream URLs go stale, and the stored-URL retry path
re-showed the same camera (sometimes a full second time via the history
interaction), which read as frequent repeats. Now opentopia cameras
re-resolve their stream URL on every play and the retry dance is gone; a
last-drawn guard also prevents any camera being drawn twice in a row.
Verified: 29 consecutive cameras, 29 distinct, 0 repeats.
Juli
cde3478337