Restore review-flagged comment content cut too aggressively in comment reduction

src/shell/persist/usage_scan.cpp

@@ -105,9 +105,10 @@ bool fxSubtreeHasInstance(const FxParmGetter& parm, int fxId,
     return false;
 }
 
-// Real-world FX containers are typically 2-4 levels deep; 32 is unreachable
-// in practice while remaining finite. The truncation->protect-all guard above
-// is the primary protection even at this depth.
+// Raised from 8 to 32 (defense in depth against truncation). Real-world FX
+// containers are typically 2-4 levels deep; 32 is unreachable in practice
+// while remaining finite. The truncation->protect-all guard above is the
+// primary protection even at this depth.
 constexpr int kMaxContainerDepth = 32;
 
 std::string trackFxParm(MediaTrack* tr, int fxId, const char* parm) {