feat(SAFE): handle failing toolz import with an error message containing the fix

Author: sfc-gh-vtimofeenko

perimeter-security-control/streamlit_app.py

@@ -10,11 +10,15 @@
 import streamlit as st
 from snowflake.snowpark.context import get_active_session
 from streamlit.navigation.page import StreamlitPage
-from toolz import pipe
-from toolz.curried import do as cdo
-from toolz.curried import filter as cfilter
-from toolz.curried import map as cmap
-from toolz.curried import pluck as cpluck
+try:
+    from toolz import pipe
+    from toolz.curried import do as cdo
+    from toolz.curried import filter as cfilter
+    from toolz.curried import map as cmap
+    from toolz.curried import pluck as cpluck
+except ImportError:
+    st.error("Could not import `toolz` package. Please make sure it's added to the list of packages in the dropdown.")
+    st.stop()
 
 st.set_page_config(layout="wide")
 # Connection short-circuits in SiS, creating the session immediately