Update code to not risk normalization that changes existing keys

[gnpaone]

• have read the CONTRIBUTING.md file
• raised a GitHub issue or discussed it on the projects chat beforehand
• added unit tests
• added integration tests
• updated documentation if needed
• updated CHANGELOG.md

Fixes #2584

[ghost]

Pull Request Revisions

Revision	Description
r1	Improved OIDC claims identifier generation Updated Identifier() method to robustly handle URL trimming and joining for OIDC claims

---

☑️ AI review skipped for r1

Help

React with emojis to give feedback on AI-generated reviews:

• 👍 means the feedback was helpful and actionable
• 👎 means the feedback was incorrect or unhelpful

💬 Replying to feedback with a comment helps us improve the system. Your input also contributes to shaping future interactions with the AI reviewer.

We'd love to hear from you—reach out anytime at [email protected].

[kradalby]

Addressed in #2593