[client] scheduler: qualify presentation feedback

Track cadence, interruption, and calibration wake reasons independently
across X11 and Wayland. Feed phase correction back only when a pure
cadence wake renders the exact frame that was queued at that wake.

Propagate EGL swap results through the display-server boundary. Reject
failed presentations and keep pending Wayland HDR descriptions inactive
until the preceding surface commit succeeds.

client/displayservers/X11/x11.h

@@ -81,6 +81,7 @@ struct X11DSState
   uint32_t          presentSerial;
   Pixmap            presentPixmap;
   XserverRegion     presentRegion;
+  _Atomic(unsigned) frameEventFlags;
   LGEvent *         frameEvent;
 
   bool xrandrSupported;