feat: simplification of default-value specification in FieldMetadata (#4592)

* feat: wip refactor default-value

* feat: health check to migrate default value

* fix: tests

* fix: refactor defaultValue to make it more clean

* fix: unit tests

* fix: front-end default value

packages/twenty-front/src/pages/settings/data-model/SettingsObjectFieldEdit.tsx

@@ -107,7 +107,7 @@ export const SettingsObjectFieldEdit = () => {
 
     const selectOptions = activeMetadataField.options?.map((option) => ({
       ...option,
-      isDefault: defaultValue?.value === option.value,
+      isDefault: defaultValue === `'${option.value}'`,
     }));
     selectOptions?.sort(
       (optionA, optionB) => optionA.position - optionB.position,