nx_tls13_server_full_handshake_test.nx

nx_tls13_server_full_handshake_test.nx -- end-to-end integration smoke composing ALL 10 TLS server stones in ONE authenticated handshake. Proves the substrate's complete TLS 1.3 server-side pipeline works in pure NishiLang. The 10-stone authenticated flow: client ClientHello bytes -> [stone 2] recv_ch state INIT -> CH_RECEIVED [stone 3] emit_sh -> SH_SENT [stone 4] derive_hs_secrets -> EE_SENT (placeholder) [stone 5] derive_traffic (no state change) [stone 6] emit_ee -> CERT_SENT [stone 6.5] emit_certificate (state stays CERT_SENT) [stone 7.5] emit_cv -> CV_SENT [stone 7] emit_sf -> SF_SENT <- client Finished bytes (constructed using shared keys) [stone 8] recv_cf + derive_app -> CONNECTED Asserts at every step: - State transition correct - server_seq / client_seq tracking correct - Each emit returns positive byte count + 0x17 (app_data) header - Final state CONNECTED + master_secret + 6 app-traffic buffers expect_exit: 0 license_tier: ORIGINAL