Add documentation for hash partitioning and the related migration steps #12

	name: Delta Integration Tests - Hash partitioning
	on:
	pull_request:
	paths:
	- 'delta/**'
	- 'tests/**'
	- 'build.sbt'
	- 'project/**'
	- '.github/workflows/ci-integration-hash-tests.yml'
	jobs:
	run:
	runs-on: ubuntu-latest
	timeout-minutes: 40
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	with:
	fetch-depth: 0
	- name: Setup JDK
	uses: actions/setup-java@v4
	with:
	distribution: 'temurin'
	java-version: '21'
	cache: 'sbt'
	check-latest: true
	- name: Setup SBT
	uses: sbt/setup-sbt@v1
	- name: Clean, build Delta image
	run: \|
	sbt -Dsbt.color=always -Dsbt.supershell=false \
	clean \
	app/Docker/publishLocal
	- name: Start services
	run: docker compose --env-file tests/docker/.env.hash.github -f tests/docker/docker-compose.yml up -d
	- name: Waiting for Delta to start
	run: \|
	URL="http://localhost:8080/v1/version"
	curl --connect-timeout 3 --max-time 5 --retry 30 --retry-all-errors --retry-delay 3 --retry-max-time 90 $URL
	- name: Test
	run: sbt -Dsbt.color=always -Dsbt.supershell=false "project tests" test
	- name: Stop & clean Docker
	if: ${{ always() }}
	run: \|
	docker compose -f tests/docker/docker-compose.yml down --rmi "local" --volumes
	docker system prune --force --volumes

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