fix(example): remove combustion dependency from examples

combustion was only needed to boot Rails/ActionController and pull in
active_support. Now that pact ships its own core_ext polyfills, it is
no longer required. Remove it from both Gemfiles and replace rails_helper.rb
with a comment explaining the change.

Also removes webmock from animal-service Gemfile (was only there as a
workaround for the WebmockHelpers bug now fixed upstream).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: 2 people

example/animal-service/Gemfile

@@ -5,9 +5,6 @@ group :development, :test do
   gem 'pact-ffi', '~> 0.4.28' # added for pact-ruby FFI support
   gem 'pry'
   gem 'rspec'
-  # required for pact-ruby
-  gem 'combustion'
-  gem 'webmock'
 end
 
 gem 'rack'

example/animal-service/spec/pact/consumers/http_spec.rb

@@ -12,6 +12,7 @@
   http_pact_provider 'Animal Service', opts: {
     pact_dir: File.expand_path('../../../../zoo-app/spec/pacts', __dir__),
     http_port: 9292,
+    provider_setup_port: 9100,
     app: AnimalService::Api
   }
 

example/animal-service/spec/rails_helper.rb

@@ -1,12 +1,4 @@
 # frozen_string_literal: true
 
-require "combustion"
-begin
-  Combustion.initialize! :action_controller do
-    config.log_level = :fatal if ENV["LOG"].to_s.empty?
-  end
-rescue => e
-  # Fail fast if application couldn't be loaded
-  warn "💥 Failed to load the app: #{e.message}\n#{e.backtrace.join("\n")}"
-  exit(1)
-end
+# Previously bootstrapped a combustion/Rails app to pull in active_support.
+# No longer needed — pact now ships its own blank?/present?/deep_dup polyfills.

example/zoo-app/Gemfile

@@ -6,8 +6,6 @@ group :development, :test do
   gem 'pact-ffi', '~> 0.4.28' # added for pact-ruby FFI support
   gem 'pry'
   gem 'rspec'
-  # required for pact-ruby
-  gem 'combustion'
 end
 
 gem 'rake'

example/zoo-app/spec/rails_helper.rb

@@ -1,13 +1,4 @@
-require "combustion"
+# frozen_string_literal: true
 
-begin
-  Combustion.initialize! :action_controller do
-    config.log_level = :fatal if ENV["LOG"].to_s.empty?
-    config.i18n.available_locales = %i[en]
-    config.i18n.default_locale = :en
-  end
-rescue => e
-  # Fail fast if application couldn't be loaded
-  warn "💥 Failed to load the app: #{e.message}\n#{e.backtrace.join("\n")}"
-  exit(1)
-end
+# Previously bootstrapped a combustion/Rails app to pull in active_support.
+# No longer needed — pact now ships its own blank?/present?/deep_dup polyfills.