Update tests/conftest.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: jirhiker

tests/conftest.py

@@ -18,6 +18,7 @@
 def pytest_configure():
     load_dotenv(override=True)
     os.environ.setdefault("POSTGRES_PORT", "54321")
+    # NOTE: This hardcoded secret key is for tests only and must NEVER be used in production.
     os.environ.setdefault("SESSION_SECRET_KEY", "test-session-secret-key")
     # Always use test database, never dev
     os.environ["POSTGRES_DB"] = "ocotilloapi_test"