Index 255a statement of scale for maps

[christinach]

Expected behavior

The 255a is included in searches. All fields that are searchable are displayed in the display of the record.

Actual behavior

The 255a is included in searches but not indexed in the decription_display field.

Steps to replicate

Example record: https://catalog.princeton.edu/catalog/9952690273506421/staff_view
255a 'Scales differ' is searchable but does not display in the record page.

bibdata/marc_to_solr/lib/traject_config.rb

Line 409 in 184c31c

to_field 'description_display', extract_marc('254a:255bcdefg:3422abcdefghijklmnopqrstuv:343abcdefghi:352abcdegi:355abcdefghj:507ab:256a:516a:753abc:755axyz:3003abcefg:362az')