Also resolve Maven plugin dependencies during setup #2

	name: "Copilot Setup Steps"

	# Automatically run the setup steps when they are changed to allow for easy validation, and
	# allow manual testing through the repository's "Actions" tab
	on:
	workflow_dispatch:
	push:
	paths:
	- .github/workflows/copilot-setup-steps.yml
	pull_request:
	paths:
	- .github/workflows/copilot-setup-steps.yml

	jobs:
	# The job MUST be called `copilot-setup-steps` or it will not be picked up by Copilot.
	copilot-setup-steps:
	runs-on: ubuntu-latest

	# Set the permissions to the lowest permissions possible needed for your steps.
	# Copilot will be given its own token for its operations.
	permissions:
	contents: read

	steps:
	- name: Checkout code
	uses: actions/checkout@v4

	- name: Set up JDK 21
	uses: actions/setup-java@v4
	with:
	java-version: '21'
	distribution: 'temurin'
	cache: maven

	# Pre-download all Maven dependencies (including from central.sonatype.com and
	# checkstyle.org) during setup, which is exempt from the agent's firewall.
	# This ensures the agent can build, test, and lint without needing network access
	# to those hosts at runtime.
	- name: Pre-download Maven dependencies
	run: mvn --batch-mode dependency:go-offline dependency:resolve-plugins -Dgpg.skip

	- name: Pre-download Maven plugin dependencies
	run: mvn --batch-mode fmt:check checkstyle:check --fail-never -Dgpg.skip

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