feat: add messaging transport rollout

tests/adapters/messaging/test_topology.py

@@ -0,0 +1,33 @@
+"""Topology constants + routing key builders (REQ-021)."""
+from __future__ import annotations
+
+from trex_core.adapters.messaging import topology
+
+
+def test_topology_constants():
+    assert topology.SNAPSHOT_REQ_QUEUE == "trex.snapshot.req"
+    assert topology.INTENT_REQ_QUEUE == "trex.intent.req"
+    assert topology.EVENTS_EXCHANGE == "trex.events"
+    assert topology.EVENTS_DLQ_EXCHANGE == "trex.events.dlq"
+
+
+def test_event_routing_key_format():
+    assert topology.event_routing_key("slot_filled_buy", "A", "005930") == \
+        "slot_filled_buy.A.005930"
+    # dots/wildcards in inputs are sanitized to underscores
+    assert topology.event_routing_key("e.x", "y*z", "a#b") == "e_x.y_z.a_b"
+    # None / empty strategy → "_"
+    assert topology.event_routing_key("e", None, "S") == "e._.S"
+
+
+def test_strategy_queue_name_and_binding_pattern():
+    assert topology.strategy_event_queue_name("A") == "trex.events.strategy.A"
+    assert topology.strategy_event_binding_pattern("A") == "*.A.#"
+
+
+def test_strategy_queue_args_have_ttl_and_max_length():
+    args = topology.STRATEGY_QUEUE_ARGS
+    assert args["x-message-ttl"] > 0
+    assert args["x-max-length"] > 0
+    assert args["x-overflow"] == "drop-head"
+    assert args["x-dead-letter-exchange"] == topology.EVENTS_DLQ_EXCHANGE