Upgrade to Rails 7.1 and apply new framework defaults

* Remove deprecated options from environments
* Remove deprecation warnings for upcoming Rails 7.2
* Dump schema with new defaults
* Remove outdated (and erroneous) data attribute in view
* Resolve a `NoMethodError` for seeds_spec.rb

bin/rails

@@ -1,4 +1,6 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
+
 APP_PATH = File.expand_path('../config/application', __dir__)
 require_relative "../config/boot"
 require "rails/commands"

bin/setup

@@ -1,11 +1,13 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
+
 require "fileutils"
 
 # path to your application root.
 APP_ROOT = File.expand_path('..', __dir__)
 
-def system!(*args)
-  system(*args) || abort("\n== Command #{args} failed ==")
+def system!(*)
+  system(*, exception: true)
 end
 
 FileUtils.chdir APP_ROOT do