Get evaluation results from S3 storage.
The results are saved to S3 after the evaluation job completes. This endpoint searches S3 directly (no repository dependency).
Args: evaluation_id: UUID of the evaluation team_id: Team ID that owns this evaluation (required query parameter) claims: JWT claims with user and team info diamond_domain: Diamond domain orchestrator (not used, kept for API consistency) storage: Evaluation storage adapter
Returns: Evaluation results as JSON
Raises: HTTPException: 404 if not found, 403 if no permission