Remove unwanted whitespace from existing Organisation records

There is an `Organisation` record in our production data that has
leading and/or trailing whitespace in its name column. This migration
removes that whitespace. Additional whitespace means records don't
sort alphabetically in an expected way.

At the time of writing there's only a single record with this issue in
Integration and none in Production (although there's no guarentees
others won't have been added by the time this migration runs). Because
there's such a small number of records it seems safe to load and
resave these records, triggering the hook added in the previous
commit.

db/migrate/20230911092404_strip_whitespace_from_organisation_names.rb

@@ -0,0 +1,9 @@
+class StripWhitespaceFromOrganisationNames < ActiveRecord::Migration[7.0]
+  NAME_HAS_LEADING_OR_TRAILING_SPACE = "name REGEXP('^\s+') OR name REGEXP('\s+$')".freeze
+
+  def up
+    Organisation.where(NAME_HAS_LEADING_OR_TRAILING_SPACE).each(&:save!)
+  end
+
+  def down; end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.0].define(version: 2023_08_16_164936) do
+ActiveRecord::Schema[7.0].define(version: 2023_09_11_092404) do
   create_table "batch_invitation_application_permissions", id: :integer, charset: "utf8mb3", force: :cascade do |t|
     t.integer "batch_invitation_id", null: false
     t.integer "supported_permission_id", null: false