* fix(inspector): live queries see every composition, wherever the playhead is
The Studio preview parks scenes away from the playhead, so a live inspect, timeline or
element-map query answered missing for every element in a parked composition. Each live
query now holds every scene mounted under its own holder, then hands the scene window back.
__hfHoldScenes keeps holds per holder, so the inspector letting go never drops a scene
Studio holds.
* fix(inspector): isolate concurrent live query scene holds