Add automatic reset demo task

[annehaley]

This only applies to instances where DEMO_MODE=True

[cloudflare-pages[bot]]

Deploying with    Cloudflare Pages

Latest commit:	5a36a70
Status:	✅  Deploy successful!
Preview URL:	https://e6d2448d.miqa.pages.dev
Branch Preview URL:	https://auto-clear-demo.miqa.pages.dev

View logs

[codecov-commenter]

Codecov Report

Base: 63.90% // Head: 63.54% // Decreases project coverage by -0.35% :warning:

Coverage data is based on head (435062e) compared to base (fe9111a). Patch coverage: 29.41% of modified lines in pull request are covered.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #635 +/- ## ========================================== - Coverage 63.90% 63.54% -0.36% ========================================== Files 38 38 Lines 1640 1657 +17 ========================================== + Hits 1048 1053 +5 - Misses 592 604 +12 ``` | [Impacted Files](https://codecov.io/gh/OpenImaging/miqa/pull/635?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=OpenImaging) | Coverage Δ | | |---|---|---| | [miqa/core/tasks.py](https://codecov.io/gh/OpenImaging/miqa/pull/635/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=OpenImaging#diff-bWlxYS9jb3JlL3Rhc2tzLnB5) | `63.33% <15.38%> (-2.75%)` | :arrow_down: | | [miqa/celery.py](https://codecov.io/gh/OpenImaging/miqa/pull/635/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=OpenImaging#diff-bWlxYS9jZWxlcnkucHk=) | `84.61% <75.00%> (-4.28%)` | :arrow_down: | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=OpenImaging). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=OpenImaging)

:umbrella: View full report at Codecov.
:loudspeaker: Do you have feedback about the report comment? Let us know in this issue.