ci: add workflow_dispatch to notify-engine #2

	name: notify-engine

	# Reverse direction of bump-engine: on every real push to main, tell
	# TechEngine to bump its TechAPI submodule pointer to this commit. This mirrors
	# TechEngine's notify-techapi.yml (which points the other way).
	#
	# Loop guard: skip pushes that ONLY move the TechEngine submodule gitlink —
	# those are bump-engine.yml's own commits. Without this, the two repos would
	# ping-pong bump commits forever. (For full symmetry TechEngine's notify-techapi
	# should likewise paths-ignore its TechAPI gitlink.)
	#
	# Token: needs a PAT with Contents:write on GetTechAPI/TechEngine, stored as the
	# ENGINE_TOKEN secret. Until that secret exists this workflow is dormant — it
	# logs a warning and skips the dispatch instead of failing the run.
	on:
	push:
	branches: [main]
	paths-ignore:
	- "TechEngine"
	workflow_dispatch: # manual reverse-sync trigger (uses main HEAD sha)

	permissions:
	contents: read

	jobs:
	notify:
	runs-on: ubuntu-latest
	env:
	ENGINE_TOKEN: ${{ secrets.ENGINE_TOKEN }}
	steps:
	- name: Dormant when ENGINE_TOKEN is unset
	if: env.ENGINE_TOKEN == ''
	run: echo "::warning::ENGINE_TOKEN not configured — reverse autosync dormant; skipping dispatch."

	- name: Dispatch techapi-updated to TechEngine
	if: env.ENGINE_TOKEN != ''
	uses: peter-evans/repository-dispatch@v3
	with:
	token: ${{ secrets.ENGINE_TOKEN }}
	repository: GetTechAPI/TechEngine
	event-type: techapi-updated
	client-payload: \|
	{"sha": "${{ github.sha }}", "ref": "${{ github.ref }}"}

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