Specs broken against Rails 7.2.2

[tagliala]

Steps to reproduce*

https://github.com/DavyJonesLocker/client_side_validations/actions/runs/11739315324/job/32703578245

Expected behavior*

Work

Actual behavior*

Error:
ActiveRecord::UniquenessValidatorTest#test_uniqueness_client_side_hash_with_empty_scope_array:
NoMethodError: undefined method `singleton_class?' for nil:NilClass
    vendor/bundle/ruby/3.2.0/gems/activerecord-7.2.2/lib/active_record/validations/uniqueness.rb:17:in `initialize'
    test/active_record/cases/test_uniqueness_validator.rb:71:in `new'
    test/active_record/cases/test_uniqueness_validator.rb:71:in `test_uniqueness_client_side_hash_with_empty_scope_array'

bin/rails test active_record/cases/test_uniqueness_validator.rb:69

System configuration*

Rails version: 7.2.2

Ruby version: 3.x

Client Side Validations version: main

Code snippet from your model of the validations*

n/a

The whole form code from your template*

n/a

The resulting HTML*

n/a

Browser's development console output*

• I confirm that my browser's development console output does not contain errors

Additional JavaScript Libraries*

n/a

Repository demostrating the issue

this repo

[tagliala]

Bisected to rails/rails@64a64fd

rails/rails#52983
rails/rails#52959

[tagliala]

Fixed in #952