fix(client/python): reachable cert-validation flag; bounded off-loop TOFU probe; license/marker fixes (Client.Python-027..031)

clients/python/tests/test_tls.py

@@ -134,6 +134,17 @@ def test_split_authority_parses_host_and_port() -> None:
     assert _split_authority(":5120") == ("localhost", 5120)
 
 
+def test_split_authority_defaults_port_for_portless_endpoint() -> None:
+    from zb_mom_ww_mxgateway.options import _split_authority
+
+    # A bare hostname (no ":port") must default to 443, not crash on int("mygateway").
+    assert _split_authority("mygateway") == ("mygateway", 443)
+    # Scheme-prefixed bare hostname behaves the same.
+    assert _split_authority("https://mygateway") == ("mygateway", 443)
+    # A non-numeric tail after a colon is treated as no explicit port.
+    assert _split_authority("mygateway:") == ("mygateway", 443)
+
+
 def test_split_authority_strips_ipv6_brackets() -> None:
     from zb_mom_ww_mxgateway.options import _split_authority