chore: Refactor handler.py to return a list of predictions

handler.py

@@ -39,6 +39,8 @@ class EndpointHandler():
         # else:
         #     prediction = self.pipeline(inputs)
         # postprocess the prediction
-        return {
-            "sparse_embeddings": "12345"
-        }
+        return [
+            [
+                {"label": 0, "score": 0.5}
+            ]
+        ]