feat(regulatory): 增加法规规则版本检查

tests/test_regulatory_rule_loader.py

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+from pathlib import Path
+
+import pytest
+from django.core.management import call_command
+
+from review_agent.models import RegulatoryRuleVersion
+from review_agent.regulatory_review.services.rule_loader import (
+    DEFAULT_RULE_CODE,
+    check_rule_version,
+    compute_file_sha256,
+    load_rule_file,
+)
+
+
+pytestmark = pytest.mark.django_db
+
+
+def test_load_rule_file_reads_demo_requirements():
+    rule_set = load_rule_file()
+
+    codes = {item["code"] for item in rule_set["requirements"]}
+    assert rule_set["code"] == DEFAULT_RULE_CODE
+    assert "product_technical_requirements" in codes
+    assert "instructions_for_use" in codes
+    assert "registration_test_report" in codes
+    assert "clinical_evaluation" in codes
+    assert "essential_principles_checklist" in codes
+
+
+def test_compute_file_sha256_changes_when_file_changes(tmp_path):
+    path = tmp_path / "rule.yaml"
+    path.write_text("code: demo\n", encoding="utf-8")
+    first = compute_file_sha256(path)
+    path.write_text("code: demo2\n", encoding="utf-8")
+
+    assert compute_file_sha256(path) != first
+
+
+def test_check_rule_version_creates_missing_db_record():
+    result = check_rule_version(update_missing=True)
+
+    record = RegulatoryRuleVersion.objects.get(code=DEFAULT_RULE_CODE)
+    assert result.status == "created"
+    assert result.current_hash == record.yaml_hash
+    assert record.rag_collection == "nmpa_ivd_registration_v1"
+
+
+def test_check_rule_version_reports_hash_mismatch_without_overwriting():
+    created = check_rule_version(update_missing=True)
+    record = RegulatoryRuleVersion.objects.get(code=DEFAULT_RULE_CODE)
+    record.yaml_hash = "stale"
+    record.save(update_fields=["yaml_hash"])
+
+    result = check_rule_version(update_missing=False)
+    record.refresh_from_db()
+
+    assert result.status == "mismatch"
+    assert result.database_hash == "stale"
+    assert result.current_hash == created.current_hash
+    assert record.yaml_hash == "stale"
+
+
+def test_regulatory_rules_check_command_reports_status(capsys):
+    call_command("regulatory_rules_check")
+
+    captured = capsys.readouterr()
+    assert DEFAULT_RULE_CODE in captured.out
+    assert "created" in captured.out or "ok" in captured.out