- Add NULL/empty column checks in fetch_ortholog_mapping - Fix NULL handling in filter_sensory_phenotypes with is_not_null guard - Replace deprecated str.concat with str.join - Add explicit schema to empty DataFrames for consistency
- Add NULL/empty column checks in fetch_ortholog_mapping - Fix NULL handling in filter_sensory_phenotypes with is_not_null guard - Replace deprecated str.concat with str.join - Add explicit schema to empty DataFrames for consistency