Add total token cost to variant stats (#13)

* Add total token cost to variant stats

* Copy over token counts for new variants

* Update invalidate call

src/server/utils/getModelName.ts

@@ -1,8 +1,9 @@
 import { isObject } from "lodash";
 import { type JSONSerializable, type SupportedModel } from "../types";
+import { type Prisma } from "@prisma/client";
 
-export function getModelName(config: JSONSerializable): SupportedModel | null {
+export function getModelName(config: JSONSerializable | Prisma.JsonValue): SupportedModel | null {
   if (!isObject(config)) return null;
   if ("model" in config && typeof config.model === "string") return config.model as SupportedModel;
-  return null
+  return null;
 }