Reframe wine-access CTest environment requirement

A quiet live Wayland desktop is not assumed to yield a reliable single-environment 7/7. Record that a purpose-built private compositor/XWayland harness may be needed and whether split-environment evidence suffices is open for review.

docs/testing/wine-proton-phases.md

@@ -480,7 +480,9 @@ through `d6a54fc` plus this freeze record):
   vet, parity, and brlapi-tagged suites pass. Wine-access CTest
   is display-environment sensitive (review-capture versus
   foreground-focus invert between the live desktop and bare
-  Xvfb); one quiet-live-desktop 7/7 run is still owed.
+  Xvfb); a single-environment 7/7 run has not been established
+  on this Wayland system and may need a purpose-built private
+  compositor/XWayland harness rather than an idle live desktop.
 - Passed so far live: Diablo IV, Mistworld, Wine Notepad
   mixed-prefix, keyboard-only preferences round trip, preliminary
   Braille movement/edit navigation, and basic Notepad++