plugin(mta): add postinstall script to fix CI release process #4118

	name: Automate changeset feedback
	on:
	pull_request_target:
	branches: ['main']

	permissions:
	pull-requests: write
	actions: none
	checks: none
	contents: none
	deployments: none
	issues: none
	packages: none
	pages: none
	repository-projects: none
	security-events: none
	statuses: none

	jobs:
	changeset-feedback:
	name: Generate Changeset Feedback
	# prevent running towards forks and version packages
	if: github.repository == 'backstage/community-plugins' && github.event.pull_request.user.login != 'backstage-service'
	runs-on: ubuntu-latest
	steps:
	- name: Harden Runner
	uses: step-security/harden-runner@63c24ba6bd7ba022e95695ff85de572c04a18142 # v2.7.0
	with:
	egress-policy: audit

	- uses: actions/checkout@1d96c772d19495a3b5c517cd2bc0cb401ea0529f # v4.1.3
	with:
	# Fetch the commit that's merged into the base rather than the target ref
	# This will let us diff only the contents of the PR, without fetching more history
	ref: 'refs/pull/${{ github.event.pull_request.number }}/merge'
	- name: fetch base
	run: git fetch --depth 1 origin ${{ github.base_ref }}

	- uses: backstage/actions/[email protected]
	name: Generate feedback
	with:
	diff-ref: 'origin/main'
	marker: <!-- changeset-feedback -->
	issue-number: ${{ github.event.pull_request.number }}
	bot-username: backstage-goalie[bot]
	app-id: ${{ secrets.BACKSTAGE_GOALIE_APPLICATION_ID }}
	private-key: ${{ secrets.BACKSTAGE_GOALIE_PRIVATE_KEY }}
	installation-id: ${{ secrets.BACKSTAGE_GOALIE_INSTALLATION_ID }}
	multiple-workspaces: true

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