Issue 801 execution quickrun

[richardjgowers]

fixes #801

Checklist

• [ ] Added a news entry

Developers certificate of origin

• [ ] I certify that this contribution is covered by the MIT License here and the Developer Certificate of Origin at https://developercertificate.org/.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 92.31%. Comparing base (4c4ce04) to head (f43d284).

:exclamation: Current head f43d284 differs from pull request most recent head 139e9c3. Consider uploading reports for the commit 139e9c3 to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #814 +/- ## ========================================== - Coverage 92.53% 92.31% -0.23% ========================================== Files 133 133 Lines 9767 9767 ========================================== - Hits 9038 9016 -22 - Misses 729 751 +22 ``` | [Flag](https://app.codecov.io/gh/OpenFreeEnergy/openfe/pull/814/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=OpenFreeEnergy) | Coverage Δ | | |---|---|---| | [fast-tests](https://app.codecov.io/gh/OpenFreeEnergy/openfe/pull/814/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=OpenFreeEnergy) | `92.31% <ø> (?)` | | | [slow-tests](https://app.codecov.io/gh/OpenFreeEnergy/openfe/pull/814/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=OpenFreeEnergy) | `?` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=OpenFreeEnergy#carryforward-flags-in-the-pull-request-comment) to find out more.

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