[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/include/app.h

@@ -103,7 +103,8 @@ bool app_getHDRDescFailed(void);
 #ifdef ENABLE_EGL
 EGLDisplay app_getEGLDisplay(void);
 EGLNativeWindowType app_getEGLNativeWindow(void);
-void app_eglSwapBuffers(EGLDisplay display, EGLSurface surface, const struct Rect * damage, int count);
+bool app_eglSwapBuffers(EGLDisplay display, EGLSurface surface,
+    const struct Rect * damage, int count);
 #endif
 
 #ifdef ENABLE_OPENGL