dita_v2: VenueTelemetrySnapshot + Zinc venue plane (4th shm partition) + local Rust target dir

Upstream-canonical commit of the ~366 lines that sat uncommitted in the working
tree (surveyed in DITAV2_SOA_SURVEY_20260702). Venue telemetry published at every
venue boundary (submit/cancel/reconcile) over the zinc venue_region; SOA per
UV DITAv2 adjudication 2026-07-03.

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

prod/clean_arch/dita_v2/launcher.py

@@ -245,9 +245,15 @@ def _build_venue(
     mock_scenario: Optional[MockVenueScenario] = None,
     bingx_config: Optional[BingxExecClientConfig] = None,
     bingx_backend: Optional[Any] = None,
+    zinc_plane: Optional[ZincPlane] = None,
     venue: Optional[VenueAdapter] = None,
 ) -> VenueAdapter:
     if venue is not None:
+        if zinc_plane is not None and hasattr(venue, "set_telemetry_plane"):
+            try:
+                venue.set_telemetry_plane(zinc_plane)
+            except Exception:
+                pass
         return venue
     resolved_mode = venue_mode or _resolve_venue_mode()
     if resolved_mode is LauncherVenueMode.BINGX:
@@ -256,7 +262,7 @@ def _build_venue(
             from prod.clean_arch.adapters.bingx_direct import BingxDirectExecutionAdapter
 
             backend = BingxDirectExecutionAdapter(bingx_config or build_bingx_exec_client_config())
-        return BingxVenueAdapter(backend=backend)
+        return BingxVenueAdapter(backend=backend, zinc_plane=zinc_plane)
     return MockVenueAdapter(mock_scenario)
 
 
@@ -342,6 +348,7 @@ def build_launcher_bundle(
         mock_scenario=mock_scenario,
         bingx_config=bingx_config,
         bingx_backend=bingx_backend,
+        zinc_plane=active_zinc_plane,
         venue=venue,
     )
     kernel = ExecutionKernel(