init: documentation and prototypes

prototype-grok4.1/direktvermittlungde-backend/test/test_documents.py

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+import pytest
+from httpx import AsyncClient
+from main import app  # Adjust import
+
+@pytest.mark.asyncio
+async def test_upload_document():
+    async with AsyncClient(app=app, base_url="http://test") as ac:
+        response = await ac.post("/documents", json={
+            "metadata": {"authority_id": "test", "reference_number": "123", "doc_type": "NOTICE", "issued_at": "2025-12-01T00:00:00Z"},
+            "encrypted_payload": "dummy_base64"
+        })
+        assert response.status_code == 201