fix(auth): a member behind the register's clock says the password changed

When a member's clock ran more than its allowance behind the register's,
the session after a reset was refused as unavailable (the re-review's tenth
finding), after the register had already reset the account and ended every
session, and the app read it as "this instance has no password sign-in".
It now has a refusal of its own (passwordChanged): the app says the password
was changed and to sign in again with the new one.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>

packages/halkyon_app/lib/l10n/halkyon_app_localizations_de.dart

@@ -807,4 +807,8 @@ class HalkyonAppLocalizationsDe extends HalkyonAppLocalizations {
 
   @override
   String get passwordDeleteSendCode => 'Code per E-Mail schicken';
+
+  @override
+  String get passwordChangedSignInAgain =>
+      'Dein Passwort wurde geändert, aber dieser Dienst konnte dich gerade noch nicht anmelden. Melde dich wieder mit dem neuen Passwort an.';
 }