fix: add suuport Japanese message of errors. (#11159)

* fix: add suuport Japanese message of errors.

* fix: change catching function.

* lint

---------

Co-authored-by: syuilo <Syuilotan@yahoo.co.jp>

packages/backend/src/misc/is-duplicate-key-value-error.ts

@@ -1,3 +1,5 @@
+import { QueryFailedError } from 'typeorm';
+
 export function isDuplicateKeyValueError(e: unknown | Error): boolean {
-	return (e as any).message && (e as Error).message.startsWith('duplicate key value');
+	return e instanceof QueryFailedError && e.driverError.code === '23505';
 }