{"service":"xt-mtls-echo (crosstalk-manager, gcp-crosstalk-teams)","time_utc":"2026-08-25T10:53:31Z","method":"GET","path":"/sitemap.xml","client_cert":{"chain_verified":"false","dnsname_sans":"","error":"client_cert_not_provided","issuer_dn":"","present":"false","serial_number":"","sha256_fingerprint":"","spiffe_id":"","subject_dn":"","uri_sans":"","valid_not_after":"","valid_not_before":""},"note":"only X-Client-Cert-* headers injected by the load balancer are read; nothing else is echoed or logged"}