When successful, returns:
{
"predictions": [
{
"timestamp": "2025-01-01 01:00:00",
"prediction": 0.01
},
{
"timestamp": "2025-01-01 02:00:00",
"prediction": 0.05
},
...
],
"best_prediction": {
"timestamp": "2025-01-01 05:00:00",
"prediction": 12,34
}
}