Clean ActiveRecord backtraces as if they are in the source

[aidanharan]

Treat ActiveRecord backtraces lines as if they are from the source code rather than from the Rails gem.

Fixes the following tests.

https://github.com/aidanharan/rails/pull/4/files#diff-895b194d1cd076295b52cf047d3452420d42f082f4208f4e97e1a9eb87caf0ee

1) Failure:
AssociationDeprecationTest::WarnModeTest#test_0001_report warns in :warn mode [/usr/local/bundle/bundler/gems/rails-4621f7131d2a/activerecord/test/cases/associations/deprecation_test.rb:127]:
Expected /The association DATS::Car#deprecated_tyres is deprecated, the method deprecated_tyres was invoked \(\/usr\/local\/bundle\/bundler\/gems\/rails-4621f7131d2a\/activerecord\/test\/cases\/associations\/deprecation_test.rb:126:in/ to match "W, [2025-07-07T09:38:38.097702 #30]  WARN -- : The association DATS::Car#deprecated_tyres is deprecated, the method deprecated_tyres was invoked ()\n".

  3) Failure:
AssociationDeprecationTest::RaiseModeTest#test_0001_report raises an error in :raise mode [/usr/local/bundle/bundler/gems/rails-4621f7131d2a/activerecord/test/cases/associations/deprecation_test.rb:183]:
Expected /The association DATS::Car#deprecated_tyres is deprecated, the method deprecated_tyres was invoked \(\/usr\/local\/bundle\/bundler\/gems\/rails-4621f7131d2a\/activerecord\/test\/cases\/associations\/deprecation_test.rb:182:in/ to match "The association DATS::Car#deprecated_tyres is deprecated, the method deprecated_tyres was invoked ()".

  4) Failure:
AssociationDeprecationTest::RaiseBacktraceModeTest#test_0001_report raises an error in :raise mode [/usr/local/bundle/bundler/gems/rails-4621f7131d2a/activerecord/test/cases/associations/deprecation_test.rb:198]:
Expected /The association DATS::Car#deprecated_tyres is deprecated, the method deprecated_tyres was invoked \(\/usr\/local\/bundle\/bundler\/gems\/rails-4621f7131d2a\/activerecord\/test\/cases\/associations\/deprecation_test.rb:196:in/ to match "The association DATS::Car#deprecated_tyres is deprecated, the method deprecated_tyres was invoked ()".

  5) Failure:
AssociationDeprecationTest::NotifyModeTest#test_0001_report publishes an Active Support notification in :notify mode [/usr/local/bundle/bundler/gems/rails-4621f7131d2a/activerecord/test/cases/associations/deprecation_test.rb:241]:
Expected /The association DATS::Car#deprecated_tyres is deprecated, the method deprecated_tyres was invoked \(\/usr\/local\/bundle\/bundler\/gems\/rails-4621f7131d2a\/activerecord\/test\/cases\/associations\/deprecation_test.rb:233:in/ to match "The association DATS::Car#deprecated_tyres is deprecated, the method deprecated_tyres was invoked ()".

  6) Failure:
AssociationDeprecationTest::WarnBacktraceModeTest#test_0001_report warns in :warn mode [/usr/local/bundle/bundler/gems/rails-[462](https://github.com/rails-sqlserver/activerecord-sqlserver-adapter/actions/runs/16113377465/job/45461734338#step:4:463)1f7131d2a/activerecord/test/cases/associations/deprecation_test.rb:151]:
Expected /The association DATS::Car#deprecated_tyres is deprecated, the method deprecated_tyres was invoked \(\/usr\/local\/bundle\/bundler\/gems\/rails-4621f7131d2a\/activerecord\/test\/cases\/associations\/deprecation_test.rb:149:in/ to match "W, [2025-07-07T09:41:27.178952 #30]  WARN -- : The association DATS::Car#deprecated_tyres is deprecated, the method deprecated_tyres was invoked ()\n".