Add Dialyzer and fix its errors #7

	name: CI

	on:
	push:
	branches:
	- main
	pull_request:
	workflow_dispatch:

	jobs:
	setup:
	name: Setup
	runs-on: ubuntu-latest

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

	- name: Setup Elixir and compile cache
	uses: ./.github/actions/setup

	- name: Compile project
	if: steps.mix-cache.outputs.cache-hit != 'true'
	run: \|
	mix deps.get
	mix deps.compile
	mix compile — warnings-as-errors

	- name: Create PLTs
	if: steps.mix-cache.outputs.cache-hit != 'true'
	run: mix dialyzer --plt --format github

	lint:
	name: Lint
	needs: setup
	runs-on: ubuntu-latest

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

	- name: Setup Elixir and compile cache
	uses: ./.github/actions/setup

	- name: Check format
	run: mix format --check-formatted

	dialyzer:
	name: Dialyzer
	needs: setup
	runs-on: ubuntu-latest

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

	- name: Setup Elixir and compile cache
	uses: ./.github/actions/setup

	- name: Dialyzer
	run: mix dialyzer --no-check --format github

	test:
	name: Test
	needs: setup
	runs-on: ubuntu-latest
	env:
	MIX_ENV: test
	services:
	rabbitmq:
	image: rabbitmq:latest
	env:
	RABBITMQ_DEFAULT_USER: guest
	RABBITMQ_DEFAULT_PASS: guest
	ports:
	- 5672:5672

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

	- name: Setup Elixir and compile cache
	uses: ./.github/actions/setup

	- name: Retrieve test cache
	uses: actions/cache@v4
	id: mix-cache-test
	with:
	path: _build/test
	key: test-${{ hashFiles('mix.lock') }}

	- name: Run test
	run: mix test

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