Fix server variable not shown (#20799)

## Before

<img width="1502" height="675" alt="image"
src="https://github.com/user-attachments/assets/b64b24b4-11a5-4f6b-a3aa-c77108f22e9d"
/>

## After

<img width="1262" height="593" alt="image"
src="https://github.com/user-attachments/assets/42d662b4-2ec6-4ad4-9d19-58f25f52475c"
/>

---------

Co-authored-by: ehconitin <nitinkoche03@gmail.com>

packages/twenty-server/src/engine/core-modules/application/application-registration-variable/application-registration-variable.service.ts

@@ -35,6 +35,14 @@ export class ApplicationRegistrationVariableService {
       workspaceId,
     );
 
+    return this.findVariablesWithObfuscatedValuesGlobal(
+      applicationRegistrationId,
+    );
+  }
+
+  async findVariablesWithObfuscatedValuesGlobal(
+    applicationRegistrationId: string,
+  ): Promise<ApplicationRegistrationVariableDTO[]> {
     const variables = await this.variableRepository.find({
       where: { applicationRegistrationId },
       order: { key: 'ASC' },