chore: import upstream snapshot with attribution

showcase/integrations/langgraph-fastapi/tests/conftest.py

@@ -0,0 +1,20 @@
+"""conftest.py — put both ``showcase/integrations`` (for ``import _shared.*``)
+and the langgraph-fastapi package root (for ``import src.agents.src.*``) on
+``sys.path`` so the CVDIAG schema-v1 suite imports exactly as the runtime does
+(``/app`` on PYTHONPATH: ``/app/_shared`` and ``/app/src/agents/src`` both
+resolve).
+"""
+
+from __future__ import annotations
+
+import sys
+from pathlib import Path
+
+# tests/conftest.py → langgraph-fastapi (the /app root: contains src/ and _shared/)
+_LGFA_ROOT = Path(__file__).resolve().parents[1]
+# langgraph-fastapi → integrations (so the _shared symlink resolves the same way)
+_INTEGRATIONS_DIR = _LGFA_ROOT.parents[0]
+
+for path in (str(_LGFA_ROOT), str(_INTEGRATIONS_DIR)):
+    if path not in sys.path:
+        sys.path.insert(0, path)