feat(ux)+fix(rings): release counter #N in the wordmark; all shared-frame rings 4->8 (#11)

Roll-forward of today-slices 6fd1d9c onto the slice-8 base, two-loop hunk dropped.

Release counter (per-build GUID read as noise; +1 per commit from git rev-list,
baseline 241 -> #13, generated by GenerateBuildStamp; GUID demotes to startup.log).
Tests pinned to Label/#N >= 13; wordmark display test asserts the Label.

Flash fix (take 14 finding): consumer holds must never outlive depth x source
period — 4 slots at high refresh lap ~27ms vs a <=50ms compositor read, so a
recycled slot flashed its new frame over the lagged old one. All shared rings 4->8
(OBS/overlay precedent for ring discipline).

Camera producer now rotates an 8-deep ring + Epoch instead of a fresh ~3.7MB
array per device frame (110-220MB/s LOH churn); WebView2 capture reuses a canvas
scratch + 8-deep output ring + a reused WriteableBitmap instead of two fresh
arrays + a fresh bitmap per 10Hz tick. Paste cache stays identity-keyed (Epoch).

App.xaml.cs

@@ -27,7 +27,8 @@ public partial class App : Application
 
         AppLog.Write("App OnStartup begin");
         // Attribution (2026-09-04): every take must be traceable to the exact binary
-        // that produced it — the wordmark superscript shows this same id.
+        // that produced it — the wordmark shows the release counter (BuildStamp.Release);
+        // the per-build GUID is forensic only and lands here.
         AppLog.Write($"Build {ytLive.Helpers.BuildStamp.Id} (compiled {ytLive.Helpers.BuildStamp.BuiltLocal})");
 
         // Velopack auto-update bootstrap — checks for updates on startup and