refactor: isolate model families end to end #591

	# SPDX-FileCopyrightText: Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
	# SPDX-License-Identifier: Apache-2.0

	name: PR Metadata

	on:
	pull_request:
	branches: [main]
	types: [opened, edited, synchronize, reopened, ready_for_review]

	permissions: {}

	concurrency:
	group: pr-metadata-${{ github.event.pull_request.number }}
	cancel-in-progress: true

	jobs:
	required:
	name: PR Metadata / Required
	runs-on: ubuntu-24.04
	timeout-minutes: 5
	permissions:
	contents: read
	steps:
	# This unprivileged check may execute pull-request code. It has read-only
	# contents permission, no secrets, and no access to protected resources.
	- name: Check out the exact pull-request merge
	uses: actions/checkout@d23441a48e516b6c34aea4fa41551a30e30af803
	with:
	ref: ${{ github.sha }}
	fetch-depth: 0
	persist-credentials: false

	- name: Set up Python
	uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405
	with:
	python-version: "3.12"

	- name: Validate required pull-request evidence
	run: python3 -m tools.pr_metadata validate --event "$GITHUB_EVENT_PATH"

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