Add affected_rows to sql.active_record

[aidanharan]

Fix ActiveRecord::InstrumentationTest#test_payload_affected_rows.

https://github.com/rails-sqlserver/activerecord-sqlserver-adapter/actions/runs/12275600971/job/34250983451

  3) Failure:
ActiveRecord::InstrumentationTest#test_payload_affected_rows [/usr/local/bundle/bundler/gems/rails-7bb8fe2d4e98/activerecord/test/cases/instrumentation_test.rb:173]:
Expected: [4, 3, 2, 0]
  Actual: [0, 0, 0, 0]

Ref: rails/rails#53277