Add redirects for previously 404'ing pages
user
```ruby
class FixOrgsSpecialCases < Mongoid::Migration
  def self.up
    existing_redirects = {
      "/government/world/organisations/british-trade-cultural-office-taiwan/about/recruitment" =>
        "/government/world/organisations/british-office-taipei/about/recruitment",
      "/government/organisations/court-of-protection" =>
        "/courts-tribunals/court-of-protection"
    }

    existing_redirects.each do |from_base_path, to_base_path|
      content_item = ContentItem.find_by(base_path: from_base_path)
      content_item.update_attributes!(
        content_id: nil,
        format: "redirect",
        publishing_app: "whitehall",
        rendering_app: nil,
        redirects: [{ path: from_base_path, type: 'exact', destination: to_base_path }],
        routes: [],
      )
    end
  rescue Mongoid::Errors::DocumentNotFound
  end

  def self.down
  end
end
```
assistant