One page that says, for each prop the Plugin Studio header sets for every plugin, which channels
can carry it (header, profile-config, URL, window, attribute), which one wins, and the default;
how the studio hands it to a pane; and the rule a plugin follows to honour it. Ends with the open
points found while writing it down (tokenUrl has no reader, the token-clear bridge, raw maps on
window.DOXA_TOKEN, ladders that disagree), each routed as a defect. Scope is the four props the
header sets today; anything wider is DECIDE-UNIVERSAL-PROPS-SCOPE.
