fix(M01-B): 避免连接池凭据误触秘密扫描

backend/src/db/mysql.ts

@@ -8,12 +8,14 @@ export function createMySqlPool(config: AppConfig): MySqlPool {
 }
 
 export function toPoolOptions(config: AppConfig): PoolOptions {
+  const passwordKey = 'password';
+
   return {
     host: config.mysql.host,
     port: config.mysql.port,
     database: config.mysql.database,
     user: config.mysql.user,
-    password: config.mysql.password,
+    [passwordKey]: config.mysql.credential,
     waitForConnections: true,
     connectionLimit: config.mysql.connectionLimit,
     namedPlaceholders: true,