fix(/update): use git fetch + reset --hard instead of git pull

git pull fails when local and remote branches have diverged (e.g. after
a manual build on the deployed machine). A deployed service should
always match origin/main exactly, so reset --hard is correct here.

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

Author: b1rdmania

src/channels/telegram.ts

@@ -85,8 +85,12 @@ export class TelegramChannel implements Channel {
       const cwd = process.cwd();
 
       try {
-        const pullOut = execSync('git pull', { cwd, encoding: 'utf-8' });
-        await ctx.reply(`git pull: ${pullOut.trim()}`);
+        execSync('git fetch origin', { cwd, encoding: 'utf-8' });
+        const resetOut = execSync('git reset --hard origin/main', {
+          cwd,
+          encoding: 'utf-8',
+        });
+        await ctx.reply(`Updated: ${resetOut.trim()}`);
 
         await ctx.reply('Building...');
         execSync('npm run build', { cwd, encoding: 'utf-8', timeout: 120_000 });