fix: migrate x-integration host.ts from pino to built-in logger

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.claude/skills/x-integration/host.ts

@@ -8,12 +8,8 @@
 import { spawn } from 'child_process';
 import fs from 'fs';
 import path from 'path';
-import pino from 'pino';
 
-const logger = pino({
-  level: process.env.LOG_LEVEL || 'info',
-  transport: { target: 'pino-pretty', options: { colorize: true } }
-});
+import { logger } from '../../../src/logger.js';
 
 interface SkillResult {
   success: boolean;