Ξ-W2-T1 re-review cleanup: soften ordering claim, bound bake guard fields, dedup gain/play-mode rationale, quiet foreign WrongProject noise

src/shell/instrument/processor_reload.cpp

@@ -298,9 +298,12 @@ void ReaSamplerProcessor::publishBuiltLocked(std::unique_ptr<LoadedInstrument> b
         graveyard_.end());
     LoadedInstrument* prev = live_.exchange(built.release());
     // A bake's reset gain lands here rather than at its call site, so the gain and the
-    // capture it belongs to become audible to process() in the same instant. A tail still
-    // ringing out of the drain does take the new gain — one gain sits above every snapshot,
-    // the same shape as ONE BLOCK, ONE RATE (see builtSampleRate_).
+    // capture it belongs to become audible to process() within one block of each other.
+    // live_.exchange above and the gain store below are two independent relaxed atomics
+    // with no ordering between them, so the honest bound is "within one block", not "the
+    // same instant" — a tail still ringing out of the drain does take the new gain, one
+    // gain sitting above every snapshot, the same shape as ONE BLOCK, ONE RATE (see
+    // builtSampleRate_).
     if (gainAtNextPublish_) {
         setMasterGainLinear(*gainAtNextPublish_);
         gainAtNextPublish_.reset();