fix(js-codegen): don't re-declare preamble Option/Result constructors #877

	# SPDX-License-Identifier: MPL-2.0
	#
	# Standalone governance gate. Previously a thin caller of
	# `hyperpolymath/standards/.github/workflows/governance-reusable.yml@main`;
	# that cross-repo dependency (a) coupled this repo's CI to another repo's
	# moving `@main` and (b) startup-failed because a `concurrency:` block in a
	# reusable-workflow caller, when the reusable also declares concurrency on the
	# same key, is rejected at run-creation (the BP008 class — see
	# spark-theatre-gate.yml's note). This self-contained version runs the repo's
	# own conservative, delta-aware checks (tools/ci/governance-standalone.sh) and
	# is a normal workflow, so the concurrency block is safe to keep.
	name: Governance
	on:
	push:
	branches: [main, master]
	pull_request:
	workflow_dispatch:
	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true
	permissions:
	contents: read
	jobs:
	governance:
	runs-on: ubuntu-latest
	timeout-minutes: 5
	steps:
	- name: Checkout code
	uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
	with:
	fetch-depth: 0
	- name: Fetch base ref (DOC-FORMAT delta)
	if: github.event_name == 'pull_request'
	run: git fetch --no-tags origin "+refs/heads/${GITHUB_BASE_REF}:refs/remotes/origin/${GITHUB_BASE_REF}"
	- name: Run governance gate
	env:
	GITHUB_BASE_REF: ${{ github.base_ref }}
	run: ./tools/ci/governance-standalone.sh

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