[alejoamiras]

Summary

aztec-node now carries v7 on main and v6 on a new v6 branch, with backports made by hand. Until the docs can carry both lines, the dev docs stay on v6 nightlies, because a v6.x release is cut from them. This PR updates the docs tooling text and the four docs skills for that layout. It also fixes the version macros, which pointed at an aztec-node ref that does not exist.

The pin script needs no change, since its tag pattern accepts v7 tags. The pin itself does not move here.

Before merge

• main's first nightly is v7.0.0-nightly.20261105, which matches the example on the networks page.
• A dry run of pinning v7.0.0-nightly.20261105 on a copy of the pin passed. The committed pin is untouched.
• The branch is rebased onto next, and the docs checks pass on it.

Changes

• Dev pin policy: the dev pin stays on the newest v6 nightly, never a v7 tag, until the docs carry a separate v7 line. A one-line check confirms that the pinned commit is on v6.
• Version macro default: without a release tag set, the legacy Labs version macros now name the pinned tag instead of next and latest. This fixes 38 dead aztec-node links and the aztec-nr tags in previews and local builds. Release cuts are unchanged.
• Foundation package versions: three Foundation package installs in two tutorials now use the Foundation version, not the Labs version.
• release-docs:
  • Migration-note triage also covers the Unreleased sections and handles hand backports.
  • The content check expects adapted backports on both sides.
  • The cut stops if the dev pin is ever a v7 tag.
• release-network-docs: the same note on adapted backports.
• update-doc-references: an aztec-node PR into main (v7) whose merge commit is not in the pin is analyzed and reported, and gets no source edits.
• updating-changelog: for a single aztec-node PR, the skill takes the major version from the PR's base branch.
• Pages:
  • The networks page's nightly row names main and 7.0.0-nightly.<date>.
  • The support page's source link points at this repository instead of a missing aztec-node branch.

Not in this PR

• Three Nargo dependencies on aztec-packages that use the Labs version macro stay broken. The paths they name no longer exist here, so no tag can fix them.
• Two dev lines, with v6 and v7 side by side, are planned separately. The dev pin moves to v7 only after that work lands.
• Labs hasn't confirmed which branch the v6 nightlies come from. Today's sits where v6 left main, so the pin check holds either way. The networks page doesn't mention v6 nightlies.

Test plan

• Docs unit tests: 147 pass, 1 env-gated skip.
• Script tests with no node_modules: 45 pass, 1 skip.
• ./bootstrap.sh check: the skills lint, the reference check, and the netlify and warnings checks all pass.
• New macro test: with no release tag set, both legacy macros give the pinned ref, and the release version still follows the nightly tag. It failed before the fix and passes after.
• cspell finds no new words on the touched pages and lines.
• Pin dry run of v7.0.0-nightly.20261105 on a copy of the pin: fetched, all four noir archives attested, and the toolchain unchanged (bb 6.0.0-rc.7, noir 1.0.0-rc.3).
• The documented v6 check prints behind for the current pin.
• Rendered the three affected tutorial pages without a release tag. Labs packages and aztec-nr tags show the pinned nightly, Foundation packages show the pinned bb version, and the aztec-node link targets exist at the tag.