Potential fix for code scanning alert no. 169: Prototype-polluting function

[graduta]

Potential fix for https://github.com/AliceO2Group/WebUi/security/code-scanning/169

To fix the issue, we need to prevent prototype pollution by validating the keys in the keys array before assigning them to the current object. Specifically:

1. Block dangerous property names like __proto__ and constructor from being used as keys.
2. Ensure that only safe keys are processed during the recursive assignment.

This can be achieved by adding a check inside the loop (line 93) to skip any key that matches __proto__ or constructor.

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