fix(upgrade): raise an HTTP 417 exception when an upgrade has unmet requirements

[mabw-rte]

Context:
This PR addresses two potential issues that can occur when upgrading studies:

• Upgrading a variant study could potentially corrupt it.
• Upgrading a parent study that has variant children could potentially corrupt those children.

Issue:
At present, our system does not support the upgrade of commands, which complicates the resolution of these issues. Until we develop a solution for upgrading commands, this PR implements measures to prevent the two situations mentioned above.

Solution:
The modifications in this PR will trigger a 417 HTTP ERROR if an attempt is made to upgrade a study that either has children or is a variant. This is a temporary measure until we implement a solution for upgrading commands.

[makdeuneuv]

@mabw-rte It's better to be more specific in the errors messages. For example :

if it's a raw study:
"Raw Study {uuid} cannot be upgraded: it has children studies, this feature isn't supported for parent of variant"
if it's a variant study:
"Variant study {child_uuid} cannot be upgraded : the feature isn't supported for variant"

I'll let you correct me if there are mistakes in my suggestions.

[laurent-laporte-pro]

Il y a des petites améliorations à faire (ou pas).

Revoir les tests unitaires : il faut simplifier.
À mon avis, les tests doivent fonctionner correctement sous Windows, car on gère seulement des cas d'erreur sans utiliser le gestionnaire de taches (c'est lui qui pose problème sous Windows).

[laurent-laporte-pro]

Peut-on supprimer le TODO ?

[laurent-laporte-pro]

@mabw-rte It's better to be more specific in the errors messages. For example :

if it's a raw study: "Raw Study {uuid} cannot be upgraded: it has children studies, this feature isn't supported for parent of variant" if it's a variant study: "Variant study {child_uuid} cannot be upgraded : the feature isn't supported for variant"

I'll let you correct me if there are mistakes in my suggestions.

En général, on cherche quand même à avoir des messages d'erreur assez courts, par exemple :

• "Upgrade not supported for variant study"
• "Upgrade not supported for parent of variants"

Ici, on dit bien que ce n'est pas supporté et on dit pourquoi.