perf(weather): wake a staged frame on a 150 ms timer, not every render (#1345)

Wake staged weather imagery on a bounded timer instead of requesting every render.

Contribution by @nu-stats.

docs/CURRENT-STATE.md

@@ -306,6 +306,10 @@ catalog construction owns each instance.
 Wind animates one forecast without advancing forecast time. Separate Weather
 observation layers provide radar and satellite history; none claims measured cloud volume.
 Weather imagery releases its camera move listener on disable and registers it once on re-enable. Disabling also clears active imagery work.
+A staged weather frame with loaded tiles and no pending requests rechecks
+readiness on a single 150 ms wake timer instead of requesting every render.
+The existing readiness conditions and two settled frames still govern promotion;
+completion, cancellation, replacement and teardown clear the wake timer.
 Weather imagery drapes onto the globe basemap. On photorealistic 3D Tiles each
 observed product is instead a raised, translucent shell: one rectangle over the
 product bounds at a fixed height (global infrared 5.5 km, regional infrared