Flag to make `??` optional for rawSql queries

This sucks (make sure to scroll right for maximum fun):

  rawSql [st|
select jobs_id, jobs_title, jobs_original_html, jobs_sanitized_html, jobs_company_id, jobs_owner_id, jobs_jobtype, jobs_category, jobs_location_id, jobs_slug, jobs_slug_offset, jobs_education, jobs_languages, jobs_certifications, jobs_experience, jobs_remote, jobs_date, jobs_uuid, jobupdates_id, jobupdates_job_id, jobupdates_at, jobupdates_status, companies_id, companies_name, companies_subdomain, companies_subdomain_verified_at, companies_owner_id, companies_description, companies_uuid
FROM       (select ??, ??, ??,
                   jobs.id as jobs_id, jobs.title as jobs_title, jobs.original_html as jobs_original_html, jobs.sanitized_html as jobs_sanitized_html, jobs.company_id as jobs_company_id, jobs.owner_id as jobs_owner_id, jobs.jobtype as jobs_jobtype, jobs.category as jobs_category, jobs.location_id as jobs_location_id, jobs.slug as jobs_slug, jobs.slug_offset as jobs_slug_offset, jobs.education as jobs_education, jobs.languages as jobs_languages, jobs.certifications as jobs_certifications, jobs.experience as jobs_experience, jobs.remote as jobs_remote, jobs.date as jobs_date, jobs.uuid as jobs_uuid, jobupdates.id as jobupdates_id, jobupdates.job_id as jobupdates_job_id, jobupdates.at as jobupdates_at, jobupdates.status as jobupdates_status, companies.id as companies_id, companies.name as companies_name, companies.subdomain as companies_subdomain, companies.subdomain_verified_at as companies_subdomain_verified_at, companies.owner_id as companies_owner_id, companies.description as companies_description, companies.uuid as companies_uuid,
            ROW_NUMBER() OVER(PARTITION BY jobs.id
                              ORDER BY jobupdates.at desc) as rk
            from jobs
            JOIN jobupdates as jobupdates
            ON jobupdates.job_id = jobs.id
            JOIN companies
            ON companies.id = jobs.company_id
            where jobs.id NOT IN (SELECT jobtasks.job_id
                                  FROM jobtasks
                                  WHERE jobtasks.finished_at IS NULL)) as jobsf
where jobsf.rk = 1;
|] []

I have to drop the rk on the floor or it complains about there being too many columns. I can't reference the columns of the subselect without aliasing them, or it complains about ambiguous references.

The issue identifies rawSql and shows an SQL query using ?? placeholders; start by locating rawSql handling in persistent and tracing how those placeholders are expanded and validated. Done means an option allows the placeholders in this query without the extra-column failure, with coverage for the shown case.