async function createJobIfNotExists(jobName) {
    await db.knex('jobs').insert({
        id: new ObjectID().toHexString(),
        name: jobName,
        started_at: new Date(),
        created_at: new Date(),
        status: 'started'
    }).onConflict('name').ignore();
}
Creates a job in the jobs table if it does not already exist.
@param {EmailAnalyticsJobName} jobName - The name of the job to create.
@returns {Promise<void>}