improvement: improve error handling and logging

[mateo-ivc]

Description

Improve and unify error handling and logging

Changelog

• In almost all /api/... files added missing error handling or logging
• Unified error handling and logging

Checklist

• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [ ] The light- and dark-theme are both supported and tested
• [ ] The design was implemented and is responsive for all devices and screen sizes
• [x] The application was tested in the most commonly used browsers (e.g. Chrome, Firefox, Safari)

(Optional) Visual Changes