[backend] feat(audit-logging): avoid fetching user to improv performance (#5480)

[RomuDeuxfois]

No description provided.

[Copilot]

Pull request overview

This PR extends the OpenAEVPrincipal abstraction to expose the authenticated user’s email directly from the security principal, which supports avoiding additional User fetches in downstream concerns like audit logging.

Changes:

• Add getEmail() to OpenAEVPrincipal.
• Implement getEmail() across SAML/OIDC/OAuth2 principals and DefaultOpenAEVPrincipal.
• Extend DefaultOpenAEVPrincipal to carry the email value.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
openaev-api/src/main/java/io/openaev/config/OpenAEVSaml2User.java	Delegate getEmail() to underlying User.
openaev-api/src/main/java/io/openaev/config/OpenAEVPrincipal.java	Add getEmail() to the principal contract.
openaev-api/src/main/java/io/openaev/config/OpenAEVOidcUser.java	Delegate getEmail() to underlying User.
openaev-api/src/main/java/io/openaev/config/OpenAEVOAuth2User.java	Delegate getEmail() to underlying User.
openaev-api/src/main/java/io/openaev/config/OpenAEVAnonymous.java	Implement getEmail() for anonymous principal (currently returns null).
openaev-api/src/main/java/io/openaev/config/DefaultOpenAEVPrincipal.java	Store email and expose it via getEmail(); constructor signature updated.