added todo

Author: MikeNitsenko

packages/cubejs-query-orchestrator/src/orchestrator/QueryCache.ts

@@ -596,7 +596,7 @@ export class QueryCache {
         },
         query: async (req, setCancelHandle) => {
           const client = await clientFactory();
-          
+
           const resultPromise = executeFn(client, req);
           let handle;
           if (resultPromise.cancel) {

packages/cubejs-query-orchestrator/src/orchestrator/QueryOrchestrator.ts

@@ -442,6 +442,8 @@ export class QueryOrchestrator {
   private createMetadataQuery(operation: string, params: Record<string, any>): QueryWithParams {
     return [
       `METADATA:${operation}`,
+      // TODO: Metadata queries need object params like [{ schema, table }]
+      // but QueryWithParams expects string[]. This forces JSON.stringify workaround.
       [JSON.stringify(params)],
       { external: false, renewalThreshold: 24 * 60 * 60 }
     ];