Add #nullable for Endpoint related classes #4334

	name: Gated-Windows
	on:
	push:
	branches:
	- 'releases/**'
	- dev
	pull_request:
	branches:
	- 'releases/**'
	- dev
	jobs:
	build_windows:
	runs-on: [windows-latest]
	strategy:
	matrix:
	dotnet-version: [ '8.0.x', '7.0.x', '6.0.x' ]
	steps:
	- uses: actions/checkout@v4
	- uses: dorny/paths-filter@v2
	id: filter
	with:
	filters: \|
	src:
	- 'src/**'
	- 'test/**'
	- 'build/**'
	- 'samples/**'
	- '*.cmd'
	- '*.ps1'
	- '**.props'
	- '**.csproj'
	- '**.targets'
	- '*.sh'
	- '*.sln'
	- name: Update SubModules
	run: git submodule update --init --recursive
	if: steps.filter.outputs.src == 'true'
	- name: Setup dotnet ${{ matrix.dotnet-version }}
	uses: actions/setup-dotnet@v3
	with:
	dotnet-version: ${{ matrix.dotnet-version }}
	- name: Display dotnet version
	run: dotnet --version
	- name: Build with dotnet
	run: "dotnet build AzureSignalR.sln"
	if: steps.filter.outputs.src == 'true'
	- name: Test
	run: dotnet test --no-build --logger trx --results-directory "TestResults-ubuntu-${{ matrix.dotnet-version }}"
	- name: Upload dotnet test results
	uses: actions/upload-artifact@v3
	with:
	name: dotnet-results-${{ matrix.dotnet-version }}
	path: TestResults-ubuntu-${{ matrix.dotnet-version }}
	# Use always() to always run this step to publish test results when there are test failures
	if: ${{ always() }}

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