fix(comments): correct stale v3 "CURRENT" payload prose to v5 in sample_map

src/vst/sample_map.cpp

@@ -353,11 +353,13 @@ struct ByteReader {
     }
 };
 
-// Append the zones payload — the shared body of the v2 performance blob and the v3 component
-// blob, so both write zones identically. Always emits PAYLOAD v2 (the S11 self-describing
-// marker + version + EXTENDED records): the marker precedes the zone count so any reader can
-// detect the record shape independently of the envelope version (see sample_map.h). The S11
-// loop/start overrides therefore round-trip through EITHER envelope with no envelope bump.
+// Append the zones payload — the shared body of the performance blob and the component blob,
+// so both write zones identically. Always emits the CURRENT PAYLOAD version (kZonesPayloadVersion
+// == v5: the S11 self-describing marker + version + EXTENDED records carrying the loop/start tail
+// AND the full play-params tail with wall-clock times stored as SECONDS): the marker precedes
+// the zone count so any reader can detect the record shape independently of the envelope version
+// (see sample_map.h). The S11 loop/start overrides and the play params therefore round-trip
+// through EITHER envelope with no envelope bump.
 void putZonesPayload(std::vector<std::uint8_t>& out, const PerformanceMap& map) {
     putU32le(out, kZonesFormatMarker);
     putU32le(out, kZonesPayloadVersion);