chore: Upgrade Rails to 7.1 - first pass (#2311)

Main actions so far:

Update Rails to 7.1.4 in Gemfile
Run bin/rails app:update to automatically update various config files
Add explicit attributes for enums without a corresponding DB column
Rename 422 unprocessable_entity to unprocessable_content
Update some Swagger methods to the new OpenAPI equivalents
Make sure that AWS library is properly included
Use Database Cleaner instead of RSpec's own transactional fixtures as it seems to work more reliably on CircleCI
Fix deprecation warnings where possible
Finish the previous Rails 7.0 upgrade by enabling all 7.0 defaults

Gemfile

@@ -5,15 +5,16 @@ git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 
 ruby File.read('.ruby-version')
 
-gem 'rails', '~> 7.0.8'
+gem 'rails', '~> 7.1.4'
 
 gem 'activerecord-import'
 gem 'auto_strip_attributes'
 gem 'aws-sdk-athena'
-gem 'aws-sdk-s3', require: false
+gem 'aws-sdk-s3'
 gem 'bcrypt', require: false
 gem 'bootsnap', require: false
 gem 'cancancan'
+gem 'csv'
 gem 'discard'
 gem 'doorkeeper', '5.5.4'
 gem 'faraday'
@@ -36,7 +37,7 @@ gem 'pg'
 gem 'prometheus-client'
 gem 'puma'
 gem 'redis'
-gem 'routing-filter'
+gem 'routing-filter', github: 'nduitz/routing-filter', ref: '7ada2f1854563852c615eec681c67f80f135ade5'
 gem 'sentry-rails'
 gem 'sentry-ruby'
 gem 'sentry-sidekiq'
@@ -83,6 +84,7 @@ end
 
 group :test do
   gem 'climate_control'
+  gem 'database_cleaner-active_record'
   gem 'rack-test'
   gem 'service_mock'
   gem 'simplecov', require: false