fix: more oidc logging

[jmattheis]

In debug mode this outputs the oidc discovery

2026-07-07T20:51:14+02:00 DBG discover config={"authorization_endpoint":"http://192.168.178.2:5556/dex/auth","claims_supported":["iss","sub","aud","iat","exp","email","email_verified","locale","name","preferred_username","at_hash"],"code_challenge_methods_supported":["S256","plain"],"device_authorization_endpoint":"http://192.168.178.2:5556/dex/device/code","grant_types_supported":["authorization_code","refresh_token","urn:ietf:params:oauth:grant-type:device_code","urn:ietf:params:oauth:grant-type:token-exchange"],"id_token_signing_alg_values_supported":["RS256"],"introspection_endpoint":"http://192.168.178.2:5556/dex/token/introspect","issuer":"http://192.168.178.2:5556/dex","jwks_uri":"http://192.168.178.2:5556/dex/keys","request_uri_parameter_supported":false,"response_types_supported":["code"],"scopes_supported":["openid","email","groups","profile","offline_access"],"subject_types_supported":["public"],"token_endpoint":"http://192.168.178.2:5556/dex/token","token_endpoint_auth_methods_supported":["client_secret_basic","client_secret_post"],"userinfo_endpoint":"http://192.168.178.2:5556/dex/userinfo"} rp.function=NewRelyingPartyOIDC