Ψ-W3 remediation: fix the verify doc's wrong render source, add missing content checks, soften unverified claims

Corrected the Render-dialog source name the refusal's evidence depends on, added a by-ear content check and a file-size channel proxy, and stopped two comments from overclaiming.

src/shell/capture/capture_realtime_finalize.cpp

@@ -186,7 +186,8 @@ CaptureResult finalizeRecording(ReaProject* proj, MediaTrack* temp,
 
     // Channel-domain rewrite, after the frame-domain trim so it acts on the final
     // frame set; it preserves the frame count, so the trimmed length above still holds.
-    const MonoCollapseOutcome collapseOutcome = collapseCapturedFileToMono(destPath);
+    const MonoCollapseOutcome collapseOutcome =
+        collapseCapturedFileToMono(destPath, "ReaSampler realtime capture");
 
     // Pure recorded-capture -> Sample mapping (identity, bounds echo, tier).
     RecordedCapture cap;