fix(Postgres Node): For select queries, empty result should be be replaced with {"success":true} (#6703)

* fix(Postgres Node): For select queries, empty result should be be replaced with `{"success":true}`

* ⚡ less checks

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Co-authored-by: Michael Kret <michael.k@radency.com>

packages/nodes-base/nodes/Postgres/v2/actions/router.ts

@@ -17,6 +17,7 @@ export async function router(this: IExecuteFunctions): Promise<INodeExecutionDat
 	const credentials = await this.getCredentials('postgres');
 	const options = this.getNodeParameter('options', 0, {});
 	options.nodeVersion = this.getNode().typeVersion;
+	options.operation = operation;
 
 	const { db, pgp, sshClient } = await configurePostgres(credentials, options);