Update various code for sqlite compatibility.

app/Handlers/Observer/BudgetLimitObserver.php

@@ -46,6 +46,7 @@ class BudgetLimitObserver
     private function updateNativeAmount(BudgetLimit $budgetLimit): void
     {
         if (!Amount::convertToNative($budgetLimit->budget->user)) {
+            Log::debug('Do not update native amount of the budget limit.');
             return;
         }
         $userCurrency               = app('amount')->getDefaultCurrencyByUserGroup($budgetLimit->budget->user->userGroup);