Store event `start` and `end` as datetimes instead of str #123

	# This workflow will install backend's requirements and run tests

	name: Run Backend Tests

	on:
	push:
	branches: [main]
	pull_request:
	branches: [main]

	permissions:
	contents: read

	jobs:
	pytest:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v4
	- name: Set up Python
	uses: actions/setup-python@v4
	with:
	python-version: '3.11'
	- name: Install dependencies
	run: \|
	cd ./backend
	python -m pip install --upgrade pip
	python -m pip install .'[test]'
	- name: Test with pytest
	run: \|
	cd ./backend && python -m pytest

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