feat: add signup disable config and fix telemetry startup (#3319)

* feat: add signup disable config and fix telemetry startup

* fix: nits for config spread and 403 checks

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

---------

Co-authored-by: Daniel Salazar <daniel.salazar@puter.com>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

src/backend/controllers/system/SystemController.js

@@ -137,6 +137,7 @@ export class SystemController extends PuterController {
                 name: 'Puter',
                 version: this.config.version ?? null,
                 environment: this.config.env ?? 'prod',
+                disable_user_signup: Boolean(this.config.disable_user_signup),
             });
         });
 

src/backend/controllers/system/SystemController.test.ts

@@ -233,6 +233,7 @@ describe('SystemController GET /whoarewe', () => {
         expect(captured.body).toMatchObject({
             name: 'Puter',
             environment: 'dev',
+            disable_user_signup: false,
         });
     });
 });