Get User Resource Access

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.