async getJobData(jobName) {
        return await db.knex('jobs').select('finished_at', 'started_at').where('name', jobName).first();
    }
Retrieves the job data for the specified job name.
@param {EmailAnalyticsJobName} jobName - The name of the job to retrieve data for.
@returns {Promise<Object|null>} The job data, or null if no job data is found.