fix: improve examples and tests due to more errors raised by the new SpeosRPC server

[StefanThoene]

Description

Adapt to new Speos RPC server behavior.
More errors are raised when objects committed are not correct.

Issue linked

Please mention the issue number or describe the problem this pull request addresses.

Checklist

• I have tested my changes locally.
• I have added necessary documentation or updated existing documentation.
• I have followed the coding style guidelines of this project.
• I have added appropriate tests (unit, integration, system).
• I have reviewed my changes before submitting this pull request.
• I have linked the issue or issues that are solved by the PR if any.
• I have assigned this PR to myself.
• I have made sure that the title of my PR follows Conventional commits style (e.g. feat: add optical property)
• I have agreed with the Contributor License Agreement (CLA).

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.83%. Comparing base (9064b19) to head (87e0d3a).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #546      +/-   ##
==========================================
- Coverage   86.87%   86.83%   -0.05%     
==========================================
  Files          35       35              
  Lines        3840     3843       +3     
==========================================
+ Hits         3336     3337       +1     
- Misses        504      506       +2     

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