Exempt ReaSampler 9000's own editor from the plugin OS drag hand-off

A dragged bank card over our own instrument's editor was OLE-dropping like a third-party plugin. Classify our channel's own .vst3 module as Instrument, not Plugin, so it keeps the normal instrument-drop outcome.

src/shell/actions/drag_out_win.h

@@ -68,7 +68,9 @@ bool pointerOverHostWindow(int screenX, int screenY);
 //   - an all-#32770 dialog-based editor (the generic Windows dialog class) resolves to no
 //     recognizable plugin module — falls to REAPER's outcome;
 //   - a .NET/WPF editor's class procedure is a CLR-thunked address with no resolvable module —
-//     also falls to REAPER's outcome.
+//     also falls to REAPER's outcome;
+//   - our own ReaSampler 9000 module (this channel's reasampler_9000[_beta].vst3, matched by
+//     basename) also falls to REAPER's outcome, deliberately — see ui::WindowFacts::ownModule.
 // The opposite direction is unguarded: a third-party hook that replaces REAPER's own chrome
 // class procedure via SetClassLongPtr(GCLP_WNDPROC) would make REAPER's own window read as
 // Plugin — toward OLE instead of away from it.