Set precision in the save function

[OGaboriault]

Description

The precision used to checkpoint the simulation control object was limited to five decimal places. As a result, when using time steps smaller than this precision, the time stored in the checkpoint file could be significantly rounded.

Solution

The std::setprecision(17) function is now used in the save function.

Testing

I have run a application test with this change and the number of decimal places was coherent with the change.

Documentation

No.

Use of LLMs (Large Language Models)

ChatGPT was asked what precision should be used. The answer was 17.

Miscellaneous (will be removed when merged)

Checklist (will be removed when merged)

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Code related list:

• All in-code documentation related to this PR is up to date (Doxygen format)
• Copyright headers are present and up to date
• Lethe documentation is up to date
• Fix has unit test(s) (preferred) or application test(s), and restart files are in the generator folder
• The branch is rebased onto master
• An entry describing the origin of the bug as well as its fix has been added in /release_notes/current/ following the instructions of /release_notes/template.md
• Code is indented with indent-all and .prm files (examples and tests) with prm-indent

Pull request related list:

• Labels are applied
• There are at least 2 reviewers (or 1 if small feature)
• If the fix is temporary, an issue is opened
• The PR description is clean and is ready to be used as the commit message when merging the PR

[blaisb]

Small thing to fix then good to go!