Ξ-W2-T1 remediation: print master gain into the bake, derive the window from the dialed sound, reset play mode to Trigger

src/ext_keys.h

@@ -55,9 +55,10 @@ inline constexpr const char* kProjExtAssignKey = "assign_request";
 // The INSTRUMENT writes one key per instance — "rsusage_<instanceGuid>" — carrying
 // the sample_usage wire record of every capture that instance holds; the EXTENSION
 // enumerates the prefix at prune-scan time so a held capture can never be pruned.
-// This is the ONE sanctioned instrument-side ext-state write (it never mutates
-// banks/view/tail/assign; the bridge's write entry point structurally accepts only
-// this prefix). The "rs" qualifier keeps a future "usage_*"-prefixed key from being
+// This is one of the TWO sanctioned instrument-side ext-state writes (the bake
+// request below is the other; neither mutates banks/view/tail/assign, and the
+// bridge's write entry points structurally accept only these two prefixes). The
+// "rs" qualifier keeps a future "usage_*"-prefixed key from being
 // swept into the FX-liveness fold. FOREVER-STABLE — changing the prefix strands
 // every saved project's usage records (prune falls back to bank-references-only
 // until instances republish).