fix: fresh install archives stale state of a previous installation; a fatal Agent loop error stops the service instead of leaving a dead 'Running' one; 1.2.3

Found by uninstall + fresh install on the clean Windows Sandbox: the old agent_state.sqlite identity conflicted with the new enrollment and the service sat idle.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

agent/tests/test_windows_service_host.py

@@ -56,3 +56,10 @@ def test_main_preserves_pywin32_cli_commands(monkeypatch):
     service.main()
 
     assert called == [service.GTIFiscalAgentService]
+
+
+def test_a_fatal_error_in_the_agent_loop_stops_the_service_instead_of_leaving_a_dead_one_running():
+    text = SERVICE_WRAPPER.read_text(encoding="utf-8")
+    body = text.split("agent_service.run(config, os.environ, stopper=self.stop_flag)", 1)[1].split("def main", 1)[0]
+    assert "except BaseException" in body and "logger" not in body.split("except BaseException")[0][-40:]     # wrapped in try/except
+    assert "LogErrorMsg" in body and "self.stop_flag.stop = True" in body and "win32event.SetEvent(self.stop_event)" in body