Silence Uninitialized warn log on start-up (#7411)

#7410


  Silences the `Uninitialized` warn log during routine beacon node health check.

validator_client/beacon_node_fallback/src/lib.rs

@@ -482,7 +482,20 @@ impl<T: SlotClock> BeaconNodeFallback<T> {
 
         for (result, node) in results {
             if let Err(e) = result {
-                if *e != CandidateError::PreGenesis {
+                match e {
+                    // Avoid spamming warns before genesis.
+                    CandidateError::PreGenesis => {}
+                    // Uninitialized *should* only occur during start-up before the
+                    // slot clock has been initialized.
+                    // Seeing this log in any other circumstance would indicate a serious bug.
+                    CandidateError::Uninitialized => {
+                        debug!(
+                            error = ?e,
+                            endpoint = %node,
+                            "A connected beacon node is uninitialized"
+                        );
+                    }
+                    _ => {
                         warn!(
                             error = ?e,
                             endpoint = %node,
@@ -491,6 +504,7 @@ impl<T: SlotClock> BeaconNodeFallback<T> {
                     }
                 }
             }
+        }
 
         drop(candidates);