Deploy: pod-launch warns that --no-sound freezes bt/rp

--no-sound strips VWE_AWE32, the FAST (28Hz SOS) clock never ticks, and
BTL4OPT hangs forever in the RIO-reset busy-wait (L4RIO.cpp SetDTR loop on
a frozen Now()) -- looks exactly like a vRIO/serial failure but isn't.
Root-caused during the 2026-07-10 dist smoke test. Only safe with a
SLOW-clock conf (setenv arg2=s). Warn at launch + document in usage/README.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

emulator/pod-launch/Program.cs

@@ -93,6 +93,11 @@ namespace VwePod
                 Console.WriteLine($"pod PID {dosbox.Id}  conf={Path.GetFileName(opt.Conf)}  work={opt.Work}");
                 if (!opt.NoSound)
                     Console.WriteLine("sound ON: boot adds ~4 min for the SoundFont upload");
+                else
+                    Console.WriteLine(
+                        "WARNING: --no-sound removes the AWE32, and BT/RP's FAST SOS clock is\n" +
+                        "         sound-driven -- the game FREEZES at RIO init (Now() never ticks).\n" +
+                        "         Use only with a conf that selects the SLOW clock (setenv arg2=s).");
 
                 // ---- Render bridge (Dave's GL): also into the job. ----
                 if (!opt.NoBridge)