add comment about applyBeforeValidation

Author: emily-shen

packages/wrangler/src/index.ts

@@ -703,6 +703,8 @@ export async function main(argv: string[]): Promise<void> {
 		command = `wrangler ${args._.join(" ")}`;
 		metricsArgs = args;
 		addBreadcrumb(command);
+		// NB despite 'applyBeforeValidation = true', this runs *after* yargs 'validates' options,
+		// e.g. if a required arg is missing, yargs will error out before we send any events :/
 		void dispatcher?.sendNewEvent("wrangler command started", {
 			command,
 			args,