nx_tls13_server_session_run_h2.nx

nx_tls13_server_session_run_h2.nx -- TUTOR-BOOTSTRAP SCAFFOLD (Claude, authored under the B1 rung(3) ALPN-h2 SERVER workflow of the R4-H2 HTTP/2-transport ladder), NOT credited as team self-authoring. THE ALPN-h2-SELECTING TLS 1.3 server handshake orchestrator. It is the byte-for-byte twin of nx_tls13_server_session_run.nx (the ECDSA path) EXCEPT the EncryptedExtensions it emits SELECTS ALPN "h2" (via the new nx_tls13_server_session_emit_ee_alpn) instead of the base empty no-ext EE. Consequence (RFC 7301 §3.2 / RFC 8446 §4.3.1): an h2-only sovereign client (nx_tls13_client_session_run_h2) that advertised ALPN ["h2"] sees its protocol SELECTED in the encrypted EE, so a CONNECTED session here means the application-data channel IS HTTP/2 -- the server half of "TLS ALPN selects h2". FOUNDED ON (composes, does NOT reinvent -- anti-orphan law; each imported EXACTLY ONCE, the RC6 double-import landmine avoided): - the SAME 10 server stones nx_tls13_server_session_run imports (recv_ch/emit_sh/emit_hrr/derive_hs/derive_traffic/emit_certificate/emit_cv/ emit_sf/recv_cf) -- the handshake body is identical to the proven base run. - nx_tls13_server_session_emit_ee_alpn (B1 rung(3), NEW): the ALPN-h2 EE stone, called at the EE step IN PLACE of the base emit_ee. We still import nx_tls13_server_session_emit_ee too (the base no-ext stone) so a caller may pick either, AND because the linker include-guards it (it is also pulled transitively) -- importing it once here is the single canonical import. This module deliberately does NOT import nx_tls13_server_session_run.nx (that would double-define _srun_write_n etc.); helpers carry a _srunh2_ prefix and the verdict consts an _H2 namespace so a caller may import BOTH this and the base server run with no symbol clash. BACK-FILL: the team RE-AUTHORS this from the DATA spec via the emitter-of-emitters (X-AUT-006c/e/f); this hand scaffold is the sanctioned one-time bootstrap only (meter-integrity, mirror nx_tls13_server_session_run.nx:1-39 / nx_tls13_client_h2run.nx:1-33). license_tier: INDEPENDENT_REDERIVE genealogy_id: international-research-sources/ietf/rfc_8446 + ietf/rfc_7301 + ietf/rfc_9113 lineage_id: nishi_tls13_server_session_run_h2_b1r3