Forward non-200 status in proxy. Start with event stats reader

disk/src/agg/enp.rs

@@ -1,6 +1,7 @@
-use items::numops::NumOps;
 use items::scalarevents::ScalarEvents;
+use items::waveevents::WaveEvents;
 use items::EventsNodeProcessor;
+use items::{numops::NumOps, statsevents::StatsEvents};
 use netpod::{AggKind, Shape};
 use std::marker::PhantomData;
 
@@ -23,3 +24,38 @@ where
         inp
     }
 }
+
+pub struct Stats1Scalar {}
+
+impl EventsNodeProcessor for Stats1Scalar {
+    type Input = StatsEvents;
+    type Output = StatsEvents;
+
+    fn create(_shape: Shape, _agg_kind: AggKind) -> Self {
+        Self {}
+    }
+
+    fn process(&self, inp: Self::Input) -> Self::Output {
+        inp
+    }
+}
+
+pub struct Stats1Wave<NTY> {
+    _m1: PhantomData<NTY>,
+}
+
+impl<NTY> EventsNodeProcessor for Stats1Wave<NTY>
+where
+    NTY: NumOps,
+{
+    type Input = WaveEvents<NTY>;
+    type Output = StatsEvents;
+
+    fn create(_shape: Shape, _agg_kind: AggKind) -> Self {
+        Self { _m1: PhantomData }
+    }
+
+    fn process(&self, _inp: Self::Input) -> Self::Output {
+        err::todoval()
+    }
+}