Emulator: parity-safe EMU8000 sample counter -- AWEUTIL runs; wire the

VGL_LABS cockpit test suite as pod-launch 'test' mode

The WC hang, root-caused in three layers (each necessary):
1. WC was rendered-samples + 100ms-capped interpolation; AWEUTIL's poll
   storm (~550k port-ops/s) starved the render thread of awe_lock, so the
   clock crawled ~90x slow. Fixed: free-running host-clock derivation +
   a fairness gate so the render thread can always take the lock.
2. Free-running at true 44.1kHz still failed: trapped port reads cost
   ~30us -- MORE than one 22.7us tick -- so consecutive reads skipped
   counter values, and AWEUTIL's WaitUntilWC (decoded at COM offset
   0x5F42) exits only on EQUALITY with a target tick: skipped value =
   missed target = 1.49s wrap penalty, or forever.
3. Advancing +1 per read still failed: WaitUntilWC reads WC TWICE per
   iteration, so its equality sample saw only every 2nd value -- wrong
   parity = infinite loop. Final semantics: during a poll storm the
   counter advances once per FOUR reads (every value observable by all
   of AWEUTIL's loop shapes; its 8192-unchanged-reads dead-clock bailout
   never trips), and resyncs to true wall time after any 50ms idle gap.
   Result: the full stock TEST.BAT (DIAGNOSE + AWEUTIL /S on both cards)
   completes in seconds.

Also: pod-launch 'test' mode -> vwetest.conf (stock TEST.BAT -> TSTALL),
DOSBox window defaults to 900,600 in test mode (the DOS screen is the
suite's UI), VWE_AWE_LOG gains storm bursts with guest cs:ip + caller and
rare-read tracing (the instrumentation that cracked this).

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

emulator/pod-launch/Modes.cs

@@ -30,6 +30,8 @@ namespace VwePod
                 Note = "BattleTech, networked cockpit. Also serves the camera ship and LIVE mission-review -- the console sets the role per-IP via the egg hostType, so no separate mode is needed." },
             new Mode { Name = "rp", ConfBase = "net_rp", Supported = true,
                 Note = "Red Planet, networked cockpit (also camera / live mission-review via egg hostType)." },
+            new Mode { Name = "test", ConfBase = "vwetest", Supported = true,
+                Note = "VGL_LABS factory cockpit test suite (C:\\VWETEST TEST.BAT -> TSTALL.EXE): RIO, plasma, audio (both AWE cards), video/Division calibration, Munga-net diagnostics." },
 
             // Distinct launches, mechanics not yet wired on the emulator:
             new Mode { Name = "review", ConfBase = null, Supported = false,