nx_docpub_publish.nx

nx_docpub_publish.nx -- the docs arc's PUBLISH LEG, wired to THE NISHI PUBLISHER (operator law: every push flows through ONE publisher via pub_submit; NO workstream pushes directly -- the sites.elf outage fix). Stages the WHOLE self-generated documentation SITE (index + reference set) by enqueueing one durable, flock'd, sha256-identified REQUEST per page to the publisher intake; the publisher SHIPS. Docs are INTERNAL behind the OPAQUE wall (operator 2026-06-21) so dest = the walled /wiki/reference/ doc-root. Proven against a DEDICATED docpub queue; the publisher workstream promotes to the canonical queue + ships (coordinate). NEVER nx_aw_push. license_tier: ORIGINAL expect_exit: 0