feat: Enhance information displayed on the system status dashboard

tests/controller/test_statistics.py

@@ -0,0 +1,14 @@
+from unittest.mock import MagicMock, patch
+
+from gns3server.api.routes.controller.controller import get_server_uptime_seconds
+
+
+def test_server_uptime_uses_process_creation_time() -> None:
+    process = MagicMock()
+    process.create_time.return_value = 50.25
+
+    with patch("gns3server.api.routes.controller.controller.time.time", return_value=200.75), \
+            patch("gns3server.api.routes.controller.controller.psutil.Process", return_value=process):
+        uptime = get_server_uptime_seconds()
+
+    assert uptime == 150