docs: 更新 root README.md 反映現況 + script 警告清單補 root README #2

	name: Docs Sync Check

	# 對 PR 變動做 code-vs-docs 同步檢查。
	# - PR 內任一 commit message 含 [skip-docs-check] 或設 SKIP_DOCS_CHECK=1 → 略過
	# - 違規 → job fail（PR check 顯示紅，不強制 block merge；要強制可在 Settings → Branches 設 required check）

	on:
	pull_request:
	branches: [main]

	# 強制 actions 用 Node 24
	env:
	FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true

	jobs:
	docs-sync-check:
	name: Docs Sync Check
	runs-on: ubuntu-latest
	timeout-minutes: 3

	steps:
	- name: Checkout (fetch full history to diff against base)
	uses: actions/checkout@v4
	with:
	fetch-depth: 0 # 預設 1 不夠，需有 base SHA 才能 diff

	- name: Run docs sync check
	run: \|
	# PR base commit SHA（GitHub Actions context 內建）
	bash .github/scripts/check-docs-sync.sh ${{ github.event.pull_request.base.sha }}

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