feat(#836)!: unification and flexibility with `AUTH_ORIGIN`

[hywax]

🔗 Linked issue

836

❓ Type of change

• [ ] 📖 Documentation (updates to the documentation, readme or JSdoc annotations)
• [ ] 🐞 Bug fix (a non-breaking change that fixes an issue)
• [ ] 👌 Enhancement (improving an existing functionality like performance)
• [x] ✨ New feature (a non-breaking change that adds functionality)
• [ ] 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• [ ] ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

Fully realized the whole idea of the issue.

📝 Checklist

• [x] I have linked an issue or discussion.
• [ ] I have added tests (if possible).
• [x] I have updated the documentation accordingly.

[hywax]

@zoey-kaiser break-change tag can be removed as backward compatibility is preserved

[phoenix-ru]

@hywax thank you for taking your time to push this PR to the end, it's very appreciated. I think in general it is in the right direction and I feel confident enough with merging it and picking up on your work to bring some improvements to origin detection discovered in #818