fix: use include user:True instead of nested select for Prisma Python compat

Prisma Python client does not support nested select within include.
Use include user:True to fetch the full user object; model_validator
extracts user_email from it.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

litellm/proxy/management_endpoints/organization_endpoints.py

@@ -723,9 +723,7 @@ async def info_organization(organization_id: str):
                 "litellm_budget_table": True,
                 "members": {
                     "include": {
-                        "user": {
-                            "select": {"user_email": True},
-                        }
+                        "user": True,
                     }
                 },
                 "teams": True,