fix: use https.globalAgent in grammY Bot to support sandbox proxy

grammY creates its own https.Agent internally, bypassing any global
proxy. In Docker Sandbox, NanoClaw sets https.globalAgent to a proxy
agent at startup. This tells grammY to use it instead. On non-sandbox
setups it's a no-op.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/channels/telegram.ts

@@ -1,3 +1,4 @@
+import https from 'https';
 import { Api, Bot } from 'grammy';
 
 import { ASSISTANT_NAME, TRIGGER_PATTERN } from '../config.js';
@@ -53,7 +54,11 @@ export class TelegramChannel implements Channel {
   }
 
   async connect(): Promise<void> {
-    this.bot = new Bot(this.botToken);
+    this.bot = new Bot(this.botToken, {
+      client: {
+        baseFetchConfig: { agent: https.globalAgent, compress: true },
+      },
+    });
 
     // Command to get chat ID (useful for registration)
     this.bot.command('chatid', (ctx) => {