add helper API for obtaining PackageAtRef symbol from RefState #44

	# This workflow builds the project for production, with IndexStoreDB integration enabled.
	name: test

	on:
	push:
	branches: [ master ]
	pull_request:
	branches: [ master ]

	jobs:
	server:
	runs-on: ubuntu-24.04
	name: Amazon Linux 2023

	strategy:
	matrix:
	image:
	- tayloraswift/5.10.0-amazonlinux2023:latest

	steps:
	- name: Checkout repository
	uses: actions/checkout@v3

	- name: Set up mock deployments
	run: \|
	docker compose -f Guides/docs.docc/local/docker-compose.yml up -d

	- name: Initialize replica set
	run: \|
	timeout 60s bash -c \
	'until docker exec -t unidoc-mongod-container \
	/bin/mongosh --file /unidoc-rs-init-containerized.js; do sleep 1; done'

	- name: Run pipeline
	run: \|
	docker run -t --rm \
	--network=unidoc-test \
	--name swift-environment \
	--user root \
	-v $PWD:/swift/swift-unidoc \
	-w /swift/swift-unidoc \
	${{ matrix.image }} \
	/bin/bash .github/pipeline

	macos:
	runs-on: macos-14
	name: macOS
	env:
	UNIDOC_ENABLE_INDEXSTORE: "1"
	DEVELOPER_DIR: "/Applications/Xcode_15.3.app/Contents/Developer"

	steps:
	- name: Checkout repository
	uses: actions/checkout@v3

	- name: Build debug
	run: \|
	swift --version
	swift build

	- name: Build release
	run: \|
	swift build -c release

	- name: Test SymbolGraphBuilder
	run: \|
	swift run -c release SymbolGraphBuilderTests

Provide feedback