Reusable UI/routes for polling for job completion

[loppear]

An interstitial route and template for users to be redirected to on job initialization that checks for completion (or a project-specific query to return a record?) before forwarding to a project-specific result/view route. e.g. maybe

jobid = await workerQueue.worker('taskName')
redir = await workerQueue.pollingUI(jobid, '/path/for/success')
res.redirect(redir)

Template name should be documented for project theming/override, and include a renderable partial of just the spinner/polling logic.