refactor: use `utc_now()` for consistent UTC datetime handling #686

	name: MyPy Type Check

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

	jobs:
	mypy:
	runs-on: depot-ubuntu-22.04
	environment: development
	steps:
	- uses: actions/checkout@v4
	- name: Set up Python
	id: setup-python
	uses: actions/setup-python@v5
	with:
	python-version: "3.10"
	- name: Install Poetry
	uses: snok/install-poetry@v1
	with:
	version: 1.8.0
	virtualenvs-create: true
	virtualenvs-in-project: true
	installer-parallel: true
	- name: Install dependencies
	run: poetry install --no-interaction --with dev
	- name: Run MyPy for graphiti-core
	shell: bash
	run: \|
	set -o pipefail
	poetry run mypy ./graphiti_core --show-column-numbers --show-error-codes \| sed -E '
	s/^(.*):([0-9]+):([0-9]+): (error\|warning): (.+) \[(.+)\]/::error file=\1,line=\2,endLine=\2,col=\3,title=\6::\5/;
	s/^(.*):([0-9]+):([0-9]+): note: (.+)/::notice file=\1,line=\2,endLine=\2,col=\3,title=Note::\4/;
	'
	- name: Install graph-service dependencies
	shell: bash
	run: \|
	cd server
	poetry install --no-interaction --with dev
	- name: Run MyPy for graph-service
	shell: bash
	run: \|
	cd server
	set -o pipefail
	poetry run mypy . --show-column-numbers --show-error-codes \| sed -E '
	s/^(.*):([0-9]+):([0-9]+): (error\|warning): (.+) \[(.+)\]/::error file=\1,line=\2,endLine=\2,col=\3,title=\6::\5/;
	s/^(.*):([0-9]+):([0-9]+): note: (.+)/::notice file=\1,line=\2,endLine=\2,col=\3,title=Note::\4/;
	'

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