…ng celery queue.

…rary disk storage to avoid clogging Redis with huge files and to combat timeout conditions encountered with very large (multi-thousand page) files. Need to add code to make this work properly with local deployments as well as S3. Also need to add tests.

…for_processing.

…n all style checks and linting.

…sing page-wise queueing, Tuning celerty workers is an ongoing process. For now, trying concurrency=1 and then scaling the celeryworker instances via docker-compose. May be able to increase concurrency. Should document this tuning processing for others with different envs (more cores, less cores, whatever).