Add Oscillation, Exposure, Total range and Transmission columns to the dewar sample table, read from SampleShortInfo.aaredb_params (already filled by spreadsheetupdater from AareDB, so no server change). Transmission is shown as percent like the user spreadsheet. The new columns are nullable, so the header sort key now puts None last instead of raising on None < float. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>