Support Rails 8.1 routing keywords

[kamal]

Summary

• pass route option hashes as keywords to Rails mapper APIs
• pass route options as keywords to Rails internal resource objects
• cover both singleton and collection JSON:API routes

Verification

• Ruby syntax check passes
• Envoy app boot and full Rails 8.1 CI provide integration coverage

The upstream release branch test harness itself does not initialize a Rails 8.1 application before loading rails/test_help, so its legacy standalone routing test cannot run unchanged on Rails 8.1.

[datadog-staging-envoy]

⚠️ Warnings

🚦 4 Pipeline jobs failed

CI | Ruby 2.6.6 Rails 6.0.3.4     

🔧 Fix in code. This looks caused by changes in this PR.

NameError: uninitialized constant ActiveSupport::LoggerThreadSafeLevel::Logger at /opt/hostedtoolcache/Ruby/2.6.6/x64/lib/ruby/gems/2.6.0/gems/activesupport-6.0.3.7/lib/active_support/logger_thread_safe_level.rb:16

CI | Ruby 2.6.6 Rails 6.1.1     

🔧 Fix in code. This looks caused by changes in this PR.

NameError: uninitialized constant ActiveSupport::LoggerThreadSafeLevel::Logger in active_support/logger_thread_safe_level.rb

CI | Ruby 2.7.2 Rails 6.0.3.4     

🔧 Fix in code. This looks caused by changes in this PR.

NameError: uninitialized constant ActiveSupport::LoggerThreadSafeLevel::Logger at /opt/hostedtoolcache/Ruby/2.7.2/x64/lib/ruby/gems/2.7.0/gems/activesupport-6.0.3.7/lib/active_support/logger_thread_safe_level.rb:16

View all 4 failed jobs.

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CI on my pull request is failing. Help me find and fix the root cause of each failing job below — they were flagged as caused by changes in this PR, so focus on the diff. For each job, explain the failure and propose a fix.

Branch: agent/rails-8-1-support

CI | Ruby 2.6.6 Rails 6.0.3.4
Commit: 1a2d38fed4de137a5501eb20aec8916c74c18468
Error (code / test):
NameError: uninitialized constant ActiveSupport::LoggerThreadSafeLevel::Logger at /opt/hostedtoolcache/Ruby/2.6.6/x64/lib/ruby/gems/2.6.0/gems/activesupport-6.0.3.7/lib/active_support/logger_thread_safe_level.rb:16
CI job: https://github.com/envoy/jsonapi-resources/actions/runs/30942192112/job/92103144594

CI | Ruby 2.6.6 Rails 6.1.1
Commit: 1a2d38fed4de137a5501eb20aec8916c74c18468
Error (code / test):
NameError: uninitialized constant ActiveSupport::LoggerThreadSafeLevel::Logger in active_support/logger_thread_safe_level.rb
CI job: https://github.com/envoy/jsonapi-resources/actions/runs/30942192112/job/92103144462

CI | Ruby 2.7.2 Rails 6.0.3.4
Commit: 1a2d38fed4de137a5501eb20aec8916c74c18468
Error (code / test):
NameError: uninitialized constant ActiveSupport::LoggerThreadSafeLevel::Logger at /opt/hostedtoolcache/Ruby/2.7.2/x64/lib/ruby/gems/2.7.0/gems/activesupport-6.0.3.7/lib/active_support/logger_thread_safe_level.rb:16
CI job: https://github.com/envoy/jsonapi-resources/actions/runs/30942192112/job/92103144560

Plus 1 more failing job not shown here.

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