Update appStore/filter_utils.py

fix arg and return in get_crs_options

appStore/filter_utils.py

@@ -96,10 +96,16 @@ def filter_results(results, country_filter, region_filter, end_year_range, crs_f
     return filtered
 
 @st.cache_data(show_spinner=False)
-def get_crs_options(_client, collection_name):
+def get_crs_options(_client, collection_name: str) -> List[str]:
     """
-    Return a sorted list of all CRS code+description combos found in the collection.
-    Used to populate the 'CRS' dropdown in the app.
+    Returns a sorted list of all CRS code+description combos found in the collection.
+
+    Args:
+        _client: The client object used to query the collection (likely a vector DB client).
+        collection_name (str): Name of the collection to search in.
+
+    Returns:
+        List[str]: A sorted list of strings in the format "<crs_key>: <description>".
     """
     results = hybrid_search(_client, "", collection_name)
     all_results = results[0] + results[1]