Grant access to a resource (project).Only works for organizational resources. Personal resources cannot be shared.
User must have appropriate permissions on the resource.Note: For org-level permissions, use OrganizationMember roles instead.:param request_fastapi: FastAPI request object.
:param resource_type: Type of resource (“project”).
:param resource_id: Resource ID.
:param access_data: Access grant data.
:param session: Database session.
:return: Created access entry.