dash works !!! good data. billing seems to work

tests/test_tracker_control_plane.py

@@ -0,0 +1,45 @@
+"""Tracker control-plane boundaries."""
+
+import subprocess
+import sys
+import textwrap
+
+
+def test_tracker_startup_does_not_import_or_load_model_backends():
+    """The public tracker is a router/API endpoint, not an inference worker."""
+    code = textwrap.dedent(
+        """
+        import builtins
+        import sys
+
+        blocked_roots = {"meshnet_node", "torch", "transformers"}
+        real_import = builtins.__import__
+
+        def guarded_import(name, globals=None, locals=None, fromlist=(), level=0):
+            root = name.split(".", 1)[0]
+            if root in blocked_roots:
+                raise AssertionError(f"tracker imported model backend dependency: {name}")
+            return real_import(name, globals, locals, fromlist, level)
+
+        builtins.__import__ = guarded_import
+
+        from meshnet_tracker.server import TrackerServer
+
+        tracker = TrackerServer()
+        port = tracker.start()
+        assert port > 0
+        tracker.stop()
+
+        imported = blocked_roots & set(sys.modules)
+        assert not imported, f"unexpected model modules imported: {sorted(imported)}"
+        """
+    )
+
+    result = subprocess.run(
+        [sys.executable, "-c", code],
+        check=False,
+        capture_output=True,
+        text=True,
+    )
+
+    assert result.returncode == 0, result.stderr