docs: document cli utility helpers

src/cli/devices-cli.ts

@@ -1,3 +1,4 @@
+// Commander registration for device pairing and auth-token commands.
 import type { Command } from "commander";
 import { applyParentDefaultHelpAction } from "./program/parent-default-help.js";
 
@@ -22,6 +23,7 @@ type DevicesRuntimeModule = typeof import("./devices-cli.runtime.js");
 let devicesRuntimePromise: Promise<DevicesRuntimeModule> | undefined;
 
 function loadDevicesRuntime(): Promise<DevicesRuntimeModule> {
+  // Keep device-pairing crypto/table dependencies out of root help startup.
   return (devicesRuntimePromise ??= import("./devices-cli.runtime.js"));
 }