fix windows numpy import and add node timestamps

backend/__init__.py

@@ -0,0 +1,18 @@
+from __future__ import annotations
+
+import numpy as np
+
+
+def _apply_numpy_compat_aliases() -> None:
+    """Restore removed NumPy scalar aliases still used by some dependencies."""
+    aliases = {
+        "complex": complex,
+        "float": float,
+        "int": int,
+    }
+    for name, value in aliases.items():
+        if not hasattr(np, name):
+            setattr(np, name, value)
+
+
+_apply_numpy_compat_aliases()