2.55.2 (2026-07-07) Bug Fixes auth: Agentic Identites mTLS gaps fix _is_mtls and SslCredentials. (#17387) (7bfa41a) auth: align mTLS discovery and enforce fail-fast transport configuration. (#17470) (f492d3d) auth: handle PermissionError on workload certificates to avoid startup hang and crash (#17568) (f538ad8)