add support for operators

src/grpc.rs

@@ -343,7 +343,8 @@ impl BrainCli for BrainCliMock {
         &self,
         req: Request<Pubkey>,
     ) -> Result<Response<InspectOperatorResp>, Status> {
-        match self.data.inspect_operator(&req.into_inner().pubkey) {
+        let req = check_sig_from_req(req)?;
+        match self.data.inspect_operator(&req.pubkey) {
             Some(op) => Ok(Response::new(op.into())),
             None => Err(Status::not_found(
                 "The wallet you specified is not an operator",