Add metadata with all seeds info

metadata.json

@@ -0,0 +1,33 @@
+{
+  "task": "phoneme",
+  "num_seeds": 5,
+  "best_seed": 7,
+  "best_f1": 0.6392,
+  "seeds": [
+    {
+      "seed": 7,
+      "f1_macro": 0.6392,
+      "path": "seed-7/pytorch_model.ckpt"
+    },
+    {
+      "seed": 8,
+      "f1_macro": 0.6386,
+      "path": "seed-8/pytorch_model.ckpt"
+    },
+    {
+      "seed": 7,
+      "f1_macro": 0.5874,
+      "path": "seed-7/pytorch_model.ckpt"
+    },
+    {
+      "seed": 1,
+      "f1_macro": 0.5864,
+      "path": "seed-1/pytorch_model.ckpt"
+    },
+    {
+      "seed": 2,
+      "f1_macro": 0.581,
+      "path": "seed-2/pytorch_model.ckpt"
+    }
+  ]
+}