security: add safe JSON version of temperature scaler (T=0.9096)

temperature_scaler.json

@@ -0,0 +1,5 @@
+{
+  "__class__": "TemperatureScaler",
+  "__description__": "Post-hoc temperature scaling. Apply as: scaled_logits = logits / T",
+  "T": 0.9095627069473267
+}