Add Elo rating system with match entry and CSV upload

- Implement EloCalculator service for 2v2 Euchre matches
- Create background job processing with GoodJob
- Add single match entry form
- Add CSV upload for batch match entry
- Create player rankings view
- Add database schema for matches and elo snapshots

config/initializers/active_job.rb

@@ -0,0 +1,6 @@
+# frozen_string_literal: true
+
+require "active_job"
+
+# Configure Active Job to use GoodJob
+ActiveJob::Base.queue_adapter = :good_job

config/initializers/good_job.rb

@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+require "good_job"
+
+# GoodJob configuration for Hanami
+# Since GoodJob is primarily designed for Rails, we configure it directly
+
+GoodJob.preserve_job_records = true
+GoodJob.retry_on_unhandled_error = false
+GoodJob.on_thread_error = ->(exception) { puts "GoodJob error: #{exception.message}" }
+
+# Set execution mode based on environment
+if ENV["GOOD_JOB_EXECUTION_MODE"]
+  GoodJob.execution_mode = ENV["GOOD_JOB_EXECUTION_MODE"].to_sym
+elsif ENV["RACK_ENV"] == "test"
+  GoodJob.execution_mode = :inline
+elsif ENV["RACK_ENV"] == "development"
+  GoodJob.execution_mode = :async
+else
+  GoodJob.execution_mode = :external
+end