conformance: add the remaining client auth test to baseline.yml and trigger conformance tests automatically

.github/workflows/conformance.yml

@@ -1,10 +1,9 @@
 name: Conformance Tests
 
 on:
-  # TODO: enable automatic triggering when tested.
-  # push:
-  #     branches: [main]
-  # pull_request:
+  push:
+    branches: [main]
+  pull_request:
   workflow_dispatch:
 
 concurrency:

conformance/baseline.yml

@@ -18,4 +18,5 @@ client:
 - auth/token-endpoint-auth-none  
 - auth/client-credentials-jwt
 - auth/client-credentials-basic
+- auth/pre-registration
 - sse-retry