Modify embed custom text search - Only one field and only exact match

[jwalgran]

Overview

Modify embedded custom text search - Only one field and only exact match

Describe the solution you'd like

• Change searchable field selection to ratio buttons instead of checkbox. Only allow one selection
• Add migrations to change the custom_text field to an array string.
  • Use multiple migrations. Add a new column, reindex to set the values, drop the old colum, rename the new column to the old name.
• Update facility indexing. Sore free text searchable value as {contributor_id}|{value}
• Update searching of custom_text to build the appropriate {contributor_id}|{value} string and use an iexact rather than icontains on the array field.
• When updating the embed map config, only reindex if the searchable field has changed.