feat(regulatory): 增加法规核查基础服务

tests/test_regulatory_storage.py

@@ -0,0 +1,26 @@
+import pytest
+
+from review_agent.models import Conversation, FileSummaryBatch, RegulatoryReviewBatch
+from review_agent.regulatory_review.storage import save_artifact
+
+
+pytestmark = pytest.mark.django_db
+
+
+def test_save_artifact_writes_file_and_records_hash(settings, tmp_path, django_user_model):
+    settings.MEDIA_ROOT = tmp_path
+    user = django_user_model.objects.create_user(username="owner", password="pass")
+    conversation = Conversation.objects.create(user=user, title="会话")
+    summary = FileSummaryBatch.objects.create(conversation=conversation, user=user, batch_no="FS-OK")
+    batch = RegulatoryReviewBatch.objects.create(
+        conversation=conversation,
+        user=user,
+        source_summary_batch=summary,
+        batch_no="RR-ART",
+    )
+
+    artifact = save_artifact(batch, name="raw.json", content='{"ok": true}', artifact_type="json")
+
+    assert artifact.content_hash
+    assert artifact.storage_path.endswith("raw.json")
+    assert (tmp_path / "regulatory_review" / "work" / "RR-ART" / "raw.json").exists()