feat: add kill-switch control flow

trex_core/adapters/messaging/rabbitmq.py

@@ -28,6 +28,7 @@ import pika
 import pika.exceptions
 
 from trex_core.adapters.messaging.topology import (
+    CONTROL_REQ_QUEUE,
     EVENTS_DLQ_EXCHANGE,
     EVENTS_DLQ_QUEUE,
     EVENTS_EXCHANGE,
@@ -142,6 +143,12 @@ class RabbitMQTransport:
             durable=True,
             arguments={"x-dead-letter-exchange": EVENTS_DLQ_EXCHANGE},
         )
+        # BAT-012 / REQ-043: operator control channel (action dispatch).
+        ch.queue_declare(
+            CONTROL_REQ_QUEUE,
+            durable=True,
+            arguments={"x-dead-letter-exchange": EVENTS_DLQ_EXCHANGE},
+        )
 
     def declare_strategy_queue(self, queue: str, binding_pattern: str) -> None:
         """Per-strategy durable queue (REQ-023 AC-4) bound to events exchange."""