feat: Add Papers With Code and Hugging Face datasets #1

	name: Validate Data Sources

	on:
	pull_request:
	paths:
	- "firstdata/sources/*/.json"
	- "firstdata/schemas/datasource-schema.json"

	jobs:
	protect-schema:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0

	- name: Block schema modifications
	run: \|
	if git diff --name-only origin/${{ github.base_ref }}...HEAD \| grep -q "firstdata/schemas/datasource-schema.json"; then
	echo "❌ PRs must not modify firstdata/schemas/datasource-schema.json"
	echo "Schema changes require direct commit to main by a maintainer."
	exit 1
	fi

	validate:
	needs: protect-schema
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4

	- name: Install uv
	uses: astral-sh/setup-uv@v5

	- name: Install dependencies
	run: uv sync

	- name: Validate all source JSON files
	run: \|
	find firstdata/sources -name "*.json" \| xargs uv run check-jsonschema \
	--schemafile firstdata/schemas/datasource-schema.json

	- name: Check for duplicate IDs
	run: \|
	uv run python - <<'EOF'
	import json, sys
	from pathlib import Path

	seen = {}
	errors = []

	for path in sorted(Path("firstdata/sources").rglob("*.json")):
	data = json.loads(path.read_text(encoding="utf-8"))
	id_ = data.get("id")
	if id_ in seen:
	errors.append(f"Duplicate id '{id_}' in:\n {seen[id_]}\n {path}")
	else:
	seen[id_] = path

	if errors:
	print("❌ Duplicate IDs found:")
	for e in errors:
	print(e)
	sys.exit(1)

	print(f"✅ All {len(seen)} IDs are unique.")
	EOF

Provide feedback