Fix NPE in sanitizeMetricName when unit or aggregationTemporality is … #596

	#
	# Copyright OpenSearch Contributors
	# SPDX-License-Identifier: Apache-2.0
	#
	# The OpenSearch Contributors require contributions made to
	# this file be licensed under the Apache-2.0 license or a
	# compatible open source license.
	#

	# Performs a license header check on new files.
	# Results are uploaded as an artifact for the comment workflow.

	name: License Header Check

	on:
	pull_request:
	types: [opened, synchronize, reopened]

	jobs:
	license-header-check:
	runs-on: ubuntu-latest
	name: Check License Headers on New Files

	steps:
	- name: Checkout code
	uses: actions/checkout@v6
	with:
	fetch-depth: 0

	- name: Setup Python
	uses: actions/setup-python@v6
	with:
	python-version: '3.14'

	- name: Run License Header Check
	id: license-check
	run: \|
	python .github/scripts/get-new-files.py \| python .github/scripts/check-license-headers.py

	- name: Save PR number
	if: always()
	run: echo "${{ github.event.pull_request.number }}" > pr_number.txt

	- name: Upload results
	if: always()
	uses: actions/upload-artifact@v4
	with:
	name: license-check-results
	path: \|
	pr_number.txt
	violations.txt

Provide feedback