chore(llmobs): refactor to use span events #1701

	name: Check for Old Target Branch

	on:
	pull_request:

	jobs:
	check_target_branch:
	name: "Check for old target branch"
	runs-on: ubuntu-latest
	permissions:
	pull-requests: write
	steps:
	- name: Check if target branch is too old to backport
	id: check-branch
	run: \|
	# Define regex for branches with major version 0 or 1, or versions from 2.0 to 2.12
	old_branch_regex="^(0\|1)(\\.\|$)\|^2\\.([0-9]\|1[0-2])(\\.\|$)"
	target_branch="${{ github.event.pull_request.base.ref }}"

	if [[ "$target_branch" =~ $old_branch_regex ]]; then
	echo "Old target branch detected: $target_branch"
	echo "old_branch=true" >> $GITHUB_ENV
	else
	echo "old_branch=false" >> $GITHUB_ENV
	fi

	- name: Old branch warning on PR
	if: env.old_branch == 'true'
	uses: thollander/actions-comment-pull-request@v2
	with:
	message: \|
	🚫 This target branch is too old or unsupported. Please update the target branch to continue.

	- name: Fail the job if branch is old
	if: env.old_branch == 'true'
	run: exit 1

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