Add rich text field to school profile

[richardpattinson]

Trello card URL

https://trello.com/c/y33lZvtU/2461-update-school-profiles-school-description-page-to-have-the-rich-text-editor

Changes in this PR:

This PR updates the School/Organisation profile description to use the rich text editor (Trix), creating a consistent experience with the Personal Statement editor. This allows schools to add formatting (bullets, bolding, etc.) to their profiles.

Technical Implementation:

• Views: Replaced the standard govuk_text_area in the profile edit form with rich_text_area (including a <noscript> fallback).

• Model: Updated Organisation.rb to use has_rich_text :description.

• Migration & Safety: - Added a migration MigrateSchoolDescriptionToRichText to safely copy existing description text from the organisations table to the action_text_rich_texts table so no data is lost.

  • Implemented self.ignored_columns += %w[description] on the Organisation model. This allows us to switch to the ActionText association immediately without needing to drop or rename the column in a way that would cause downtime or lock the database (avoiding online_migrations conflicts).

• Is there anything specific you want feedback on?

  • Please review the migration logic to ensure the backfill strategy (find_each loop) is performant and safe for production.

Checklists:

Data & Schema Changes

If this PR modifies data structures or validations, check the following:

• Adds/removes model validations
• Adds/removes database fields (Migrating data to ActionText and ignoring the legacy column)
• Modifies Vacancy enumerables (phases, working patterns, job roles, key stages, etc.)

If any of the above options has changed then the author must check/resolve all of the following...

Integration Impact

Does this change affect any of these integrations?

• DfE Analytics platform
• Legacy imports mappings
• DWP Find a Job export mappings
• Publisher ATS API (may require mapping updates or API versioning)

User Experience & Data Integrity

Could this change impact:

• Existing subscription alerts (will legacy subscription search filters break?)
• Legacy vacancy copying (will copied vacancies fail new validations?)
• In-progress drafts for Vacancies or Job Applications