DB 질의 로그 추가

src/lib/database.ts

@@ -38,15 +38,35 @@ async function connectWithRetry(maxRetries: number = 10, baseDelay: number = 100
   throw new Error('Max retries exceeded');
 }
 
+function wrapPoolWithWriteLogging(pool: pg.Pool): pg.Pool {
+  const originalQuery = pool.query.bind(pool);
+
+  pool.query = ((text: any, values?: any, callback?: any) => {
+    const sqlText = typeof text === 'string' ? text : text?.text;
+    const isWriteQuery = typeof sqlText === 'string' && /^(INSERT|UPDATE|DELETE)\b/i.test(sqlText.trim());
+
+    if (isWriteQuery) {
+      console.info('[DB WRITE]', {
+        sql: sqlText,
+        params: values ?? null,
+      });
+    }
+
+    return originalQuery(text as any, values as any, callback as any);
+  }) as typeof pool.query;
+
+  return pool;
+}
+
 // Initialize database schema
 export async function initializeDatabase(options: DatabaseOptions = {}) {
   // Initialize pool
-  db = new Pool({
+  db = wrapPoolWithWriteLogging(new Pool({
     connectionString: options.url || process.env.DATABASE_URL || 'postgresql://postgres:password@localhost:5432/linkforty',
     ssl: process.env.NODE_ENV === 'production' ? { rejectUnauthorized: false } : false,
     min: options.pool?.min || 2,
     max: options.pool?.max || 10,
-  });
+  }));
 
   const client = await connectWithRetry();