Get a specific user’s access entries for a resource.Returns all access entries (direct user grants + team-based grants)
and the effective role (highest permission level).:param request_fastapi: FastAPI request object.
:param resource_type: Type of resource (“project”).
:param resource_id: Resource ID.
:param user_id: User ID to check access for.
:param session: Database session.
:return: User’s access entries and effective role.