feat: add metric gauge notification api #552

	name: Test
	on: [push]

	jobs:
	test:
	runs-on: ubuntu-latest
	services:
	postgres:
	image: postgres:13
	ports:
	- 5432:5432
	env:
	POSTGRES_PASSWORD: postgres
	options: >-
	--health-cmd pg_isready
	--health-interval 10s
	--health-timeout 5s
	--health-retries 5
	steps:
	- name: Check out code into the Go module directory
	uses: actions/checkout@v2
	- name: Set up Go 1.21
	uses: actions/setup-go@v2
	with:
	go-version: 1.21
	id: go
	- name: Install dependencies
	run: sudo apt-get install build-essential
	- name: Install packages
	run: go mod tidy
	- name: Run Test
	env:
	POSTGRES_PASSWORD: postgres
	run: make test
	- name: Send coverage to coveralls
	uses: shogo82148/actions-goveralls@v1
	with:
	path-to-profile: coverage.out

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