Upload completed Stage 2 checkpoints

metrics/stage2_step_0050000_metrics.json

@@ -0,0 +1,10 @@
+{
+  "metrics": {
+    "eval/decoded_mse": 0.016971979439258576,
+    "eval/decoded_psnr": 23.723274943600607,
+    "eval/latent_loss": 0.2182662630081177,
+    "eval/latent_mse": 0.41011085987091067,
+    "eval/num_images": 100.0
+  },
+  "step": 50000
+}