Add test exposing errors in scope_at_location
Add test exposing errors in scope_at_location

Example:
```ruby
ERROR NameTest#test_scope_at_location (0.90s)
Minitest::UnexpectedError:         ActiveRecord::StatementInvalid: Mysql2::Error: Unknown column 'names.location_id' in 'where clause'
            test/models/name_test.rb:3562:in `test_scope_at_location'
```

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