Bake window: derive it from the rate the voice actually reads at, so a dialled Rate or downward Pitch no longer truncates the file

tests/test_bake_reset.cpp

@@ -50,6 +50,8 @@ InstrumentParams dialed() {
     p.play.pitchEnv.peakSemitones = -7.0;
     p.play.pitchEnv.shape.attackSeconds = 0.05;
     p.play.pitchVelocityCurve = VelocityCurve::linear();
+    p.play.playRate = 0.5;
+    p.play.pitchOffsetSemitones = -7.5;
     p.play.filter.enabled = true;
     p.play.filter.modAmount = -0.8;
     p.play.filter.velAmount = 0.6;
@@ -139,6 +141,15 @@ int main() {
     CHECK(after.play.pitchEnv.peakSemitones == 0.0);
     CHECK(after.play.pitchEnv.shape.attackSeconds == freshPlay.pitchEnv.shape.attackSeconds);
 
+    // --- RESET: Rate and the baseline Pitch offset -----------------------------------
+    // Both are processing the bake already printed, so the whitelist leaves them at their
+    // defaults — the safe direction. A second bake of the result at a still-dialled rate would
+    // otherwise re-stretch what the first one baked in.
+    CHECK(after.play.playRate == 1.0);
+    CHECK(after.play.pitchOffsetSemitones == 0.0);
+    CHECK(after.play.playRate == freshPlay.playRate);
+    CHECK(after.play.pitchOffsetSemitones == freshPlay.pitchOffsetSemitones);
+
     // --- RESET: the filter, including its velocity/key-tracking mod -----------------
     CHECK(!after.play.filter.enabled);
     CHECK(after.play.filter.modAmount == 0.0);