feat(server)!: oauth encryption algorithm setting (#6818)

* feat: add oauth signing algorithm setting

* chore: open api

* chore: change default to RS256

* feat: test and clean up

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Co-authored-by: Jason Rasmussen <jrasm91@gmail.com>

server/src/domain/auth/auth.service.spec.ts

@@ -73,7 +73,7 @@ describe('AuthService', () => {
 
     jest.spyOn(generators, 'state').mockReturnValue('state');
     jest.spyOn(Issuer, 'discover').mockResolvedValue({
-      id_token_signing_alg_values_supported: ['HS256'],
+      id_token_signing_alg_values_supported: ['RS256'],
       Client: jest.fn().mockResolvedValue({
         issuer: {
           metadata: {