chore: Export usageV2 sources array

Author: arcoraven

packages/service-utils/src/core/usageV2.ts

@@ -1,12 +1,14 @@
-export type UsageV2Source =
-  | "bundler"
-  | "engine"
-  | "insight"
-  | "nebula"
-  | "rpc"
-  | "sdk"
-  | "storage"
-  | "wallet";
+export const USAGE_V2_SOURCES = [
+  "bundler",
+  "engine",
+  "insight",
+  "nebula",
+  "rpc",
+  "sdk",
+  "storage",
+  "wallet",
+] as const;
+export type UsageV2Source = (typeof USAGE_V2_SOURCES)[number];
 export function getTopicName(source: UsageV2Source) {
   return `usage_v2.raw_${source}`;
 }