[AZ-178] Add real-video streaming test, update e2e tests, mark task done

- Add tests/test_az178_realvideo_streaming.py: integration test that validates
  frame decoding begins while upload is still in progress using a real video fixture
- Add conftest.py: pytest plugin for per-test duration reporting
- Update e2e tests (async_sse, performance, security, streaming_video_upload, video)
  and run-tests.sh for updated test suite
- Move AZ-178 task to done/; add data/ to .gitignore (StreamingBuffer temp files)
- Update autopilot state to step 12 (Security Audit) for new feature cycle

Made-with: Cursor

e2e/tests/test_security.py

@@ -29,15 +29,14 @@ def test_nft_sec_01_malformed_multipart(base_url, http_client):
     assert http_client.get("/health").status_code == 200
 
 
-@pytest.mark.slow
-@pytest.mark.timeout(300)
+@pytest.mark.timeout(30)
 def test_nft_sec_02_oversized_request(http_client):
     large = os.urandom(50 * 1024 * 1024)
     try:
         r = http_client.post(
             "/detect",
             files={"file": ("large.jpg", large, "image/jpeg")},
-            timeout=180,
+        timeout=15,
         )
     except requests.RequestException:
         pass