handle out-of-range panic

internal/statsapi/feed.go

@@ -76,7 +76,15 @@ func patch(obj any, path string, value any) error {
 		if err != nil {
 			break
 		}
-		// FIXME: think i need to do bounds checking here too
+
+		if len(v) <= idx {
+			arr := make([]any, idx+1)
+			for i, val := range v {
+				arr[i] = val
+			}
+			v = arr
+		}
+
 		err = patch(v[idx], rest, value)
 	default:
 		err = errors.New("couldn't determine type")