fix: Enable Lingui recommended rules and fix all translation violations (#14133)

- Enable lingui/no-single-variables-to-translate and all other
recommended Lingui rules
- Fix single variable translation patterns (t`${variable}` → variable)
- Fix expression-in-message violations by extracting variables
- Fix t-call-in-function violations by moving translations inside
functions
- Update ESLint configs to use linguiPlugin.configs['flat/recommended']
- Clean up unused imports and improve translation patterns

packages/twenty-server/src/engine/workspace-manager/workspace-migration-v2/interceptors/workspace-migration-builder-exception-v2-formatter.ts

@@ -13,11 +13,14 @@ export const workspaceMigrationBuilderExceptionV2Formatter = (
   const { errors, summary } =
     fromWorkspaceMigrationBuilderExceptionToValidationResponseError(error);
 
+  const invalidObjects = summary.invalidObjects;
+  const invalidFields = summary.invalidFields;
+
   throw new BaseGraphQLError(error.message, ErrorCode.BAD_USER_INPUT, {
     code: 'METADATA_VALIDATION_ERROR',
     errors,
     summary,
-    message: `Validation failed for ${summary.invalidObjects} object(s) and ${summary.invalidFields} field(s)`,
-    userFriendlyMessage: t`Validation failed for ${summary.invalidObjects} object(s) and ${summary.invalidFields} field(s)`,
+    message: `Validation failed for ${invalidObjects} object(s) and ${invalidFields} field(s)`,
+    userFriendlyMessage: t`Validation failed for ${invalidObjects} object(s) and ${invalidFields} field(s)`,
   });
 };