feat: add readable duplex messaging

Assistant: codex
Assistant-Model: gpt-5.6-sol
Assistant-Session: 01a03397-4d51-7fd1-8ff2-946eb22ea2bc

tests/test_config_command.py

@@ -6,6 +6,9 @@ from tamq.cli import main
 def test_config_command(monkeypatch, capsys, tmp_path):
     monkeypatch.setenv("TAMQ_STATE_DIR", str(tmp_path / "state"))
     assert main(["config"]) == 0
-    output = json.loads(capsys.readouterr().out)
-    assert output["database"].endswith("tamq.sqlite3")
-    assert output["policy_profile"] == "default"
+    result = json.loads(capsys.readouterr().out)
+    assert result["maxmsg"] == 8
+    assert result["maxin"] == 1024
+    assert result["maxout"] == 32768
+    assert result["database"].endswith("tamq.sqlite3")
+    assert result["policy_profile"] == "default"