make case catalog read-only

tests/test_demo_flow.py

@@ -1,15 +1,17 @@
 import asyncio
 import os
 import sys
+import tempfile
 from pathlib import Path
 
-os.environ.setdefault("DATABASE_URL", "sqlite:///./storage/test_demo_flow.db")
+TEST_DB_PATH = Path(tempfile.gettempdir()) / "medical_agent_test_demo_flow.db"
+TEST_DB_PATH.unlink(missing_ok=True)
+os.environ["DATABASE_URL"] = f"sqlite:///{TEST_DB_PATH.as_posix()}"
+os.environ["REPORT_STORAGE_DIR"] = str(Path(tempfile.gettempdir()) / "medical_agent_test_reports")
 os.environ.setdefault("RUNTIME_MEMORY_BACKEND", "memory")
 os.environ.setdefault("LLM_MOCK_ENABLED", "true")
 
 sys.path.insert(0, str(Path(__file__).resolve().parents[1]))
-if os.getenv("DATABASE_URL") == "sqlite:///./storage/test_demo_flow.db":
-    Path("storage/test_demo_flow.db").unlink(missing_ok=True)
 
 from sqlalchemy import select