dita_v2(test): enforce post-ack atomicity and suite integrity

prod/clean_arch/dita_v2/test_flaws.py

@@ -55,7 +55,10 @@ def _mk_intent(
 ) -> KernelIntent:
     return KernelIntent(
         timestamp=datetime.now(timezone.utc),
-        intent_id=kw.pop("intent_id", trade_id),
+        # Venue client IDs must distinguish entry and exit orders. Reusing the
+        # trade ID for both makes one fill match both active orders, which the
+        # identity-first Rust router correctly refuses to misclassify.
+        intent_id=kw.pop("intent_id", f"{trade_id}:{action.value.lower()}"),
         trade_id=trade_id,
         slot_id=slot_id,
         asset=asset,