* fix(#2988): local changeset/docs lint falls back to next, not main
Both scripts/changeset/lint.cjs and scripts/lint-docs-required.cjs resolved
their diff base as GITHUB_BASE_REF || 'main'. GITHUB_BASE_REF is set only in
GitHub Actions; locally it falls back to 'main' (the release branch), which
lags far behind 'next' (the integration branch every PR targets). The
oversized diff range swept in every changeset fragment merged since the last
release, so the lint passed on the first fragment it saw regardless of
whether the current PR authored it — structurally vacuous.
Changed the fallback to 'next' (DEFAULT_BASE constant, exported from both
scripts for parity). CI behavior unchanged (GITHUB_BASE_REF is set there).
Added a parity test asserting both lints resolve the same base.
* chore(#2988): backfill changeset PR number 3095
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Co-authored-by: sim <sim@local>
2843e25bf3