Update ServiceRequirementDef to set auth as 'core' instead of 'required'

Author: hotlong

packages/spec/src/system/core-services.test.ts

@@ -48,7 +48,7 @@ describe('ServiceRequirementDef', () => {
   it('should define required services', () => {
     expect(ServiceRequirementDef.metadata).toBe('required');
     expect(ServiceRequirementDef.data).toBe('required');
-    expect(ServiceRequirementDef.auth).toBe('required');
+    expect(ServiceRequirementDef.auth).toBe('core');
   });
 
   it('should define core services', () => {

packages/spec/src/system/core-services.zod.ts

@@ -60,7 +60,9 @@ export const ServiceRequirementDef = {
   // Required: The kernel cannot function without these
   metadata: 'required',
   data: 'required',
-  auth: 'required',
+
+  // Core: Highly recommended, defaults to in-memory / no-op if missing
+  auth: 'core',
 
   // Core: Highly recommended, defaults to in-memory if missing
   cache: 'core',