Fix searching for ids with selected list input

[vaot]

Motivation / Background

• When searching for multiple fields including id, other searchable inputs force the predicate to eq rather than cont, and selected-list does not, which results in a SQL error.

Detail

This Pull Request changes the predicate to eq when the field is id.

Additional information

From:

{"groupings"=>{"0"=>{"m"=>"or", "name_cont"=>"test", "id_cont"=>"test"}}, "combinator"=>"and"}

To:

{"groupings"=>{"0"=>{"m"=>"or", "name_cont"=>"test", "id_eq"=>"test"}}, "combinator"=>"and"}

Checklist

Before submitting the PR make sure the following are checked:

• This Pull Request is related to one change. Changes that are unrelated should be opened in separate PRs.
• Commit message has a concise description of what changed and why.
• Tests are added or updated if you fix a bug or add a feature.
• Documentation has been added or updated if you add a feature or modify an existing one.
• CHANGELOG files are updated for the changed libraries if there is a behavior change or additional feature (under the "Unreleased" heading if this is not a version change).
• My changes don't introduce any linter rule violations.