docs: add work log for 2026-06-15 and update DB deletion policy in README

scratch/update_dept_saman.cjs

@@ -0,0 +1,32 @@
+const mysql = require('mysql2/promise');
+require('dotenv').config();
+
+async function updateDepartments() {
+  const connection = await mysql.createConnection({
+    host: process.env.DB_HOST,
+    user: process.env.DB_USER,
+    password: process.env.DB_PASS,
+    database: process.env.DB_NAME,
+    port: parseInt(process.env.DB_PORT || '3306')
+  });
+
+  console.log("🚀 부서명 '삼안' 통합 업데이트 시작...");
+
+  const [result] = await connection.query(`
+    UPDATE asset_core 
+    SET current_dept = '삼안' 
+    WHERE current_dept NOT IN ('총괄기획실', '기술개발센터', '현타', '장헌', '한맥', 'PTC', '', '삼안') 
+      AND current_dept IS NOT NULL
+  `);
+
+  console.log(`✅ 업데이트 완료: ${result.affectedRows}건의 부서명이 '삼안'으로 변경되었습니다.`);
+
+  // 최종 확인용 카운트
+  const [rows] = await connection.query('SELECT current_dept, COUNT(*) as count FROM asset_core GROUP BY current_dept');
+  console.log('\n📊 최종 부서 분포:');
+  console.table(rows);
+
+  await connection.end();
+}
+
+updateDepartments().catch(console.error);