fix(commands): point set.mode description at the schema enum

Old description said "auto / manual" but the schema declares four modes.
New description enumerates the allowed values and refers readers to the
schema. RM's wiki/Reference-Contracts.md is hand-maintained (no AUTOGEN
markers) and already says "one of the allowed mode names" — no
regeneration needed.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/commands/index.js

@@ -19,7 +19,7 @@ module.exports = [
     topic: 'set.mode',
     aliases: ['setMode'],
     payloadSchema: { type: 'string' },
-    description: 'Switch the machine between auto / manual control modes.',
+    description: 'Switch the operating mode. Allowed: `auto`, `virtualControl`, `fysicalControl`, `maintenance` (schema-validated in `rotatingMachine.json` → `mode.current`).',
     handler: handlers.setMode,
   },
   {