Graceful handling of missing validator data in pcli (#4536)

## Issue ticket number and link

#4533 

## Checklist before requesting a review

- [x] If this code contains consensus-breaking changes, I have added the
"consensus-breaking" label. Otherwise, I declare my belief that there
are not consensus-breaking changes, for the following reason:

  > only changes client code

crates/bin/pcli/src/command/view/staked.rs

@@ -65,11 +65,6 @@ impl StakedCmd {
                 continue;
             };
 
-            let info = validators
-                .iter()
-                .find(|v| v.validator.identity_key == dt.validator())
-                .expect("validator info exists in returned data");
-
             let delegation = Value {
                 amount: notes_by_address
                     .values()
@@ -78,6 +73,22 @@ impl StakedCmd {
                 asset_id: dt.id(),
             };
 
+            let info = match validators
+                .iter()
+                .find(|v| v.validator.identity_key == dt.validator())
+            {
+                Some(info) => info,
+                None => {
+                    table.add_row(vec![
+                        "missing data".to_string(),
+                        "missing data".to_string(),
+                        "missing data".to_string(),
+                        delegation.format(&asset_cache),
+                    ]);
+                    continue;
+                }
+            };
+
             let unbonded = Value {
                 amount: info
                     .rate_data

crates/view/src/planner.rs

@@ -435,9 +435,10 @@ impl<R: RngCore + CryptoRng> Planner<R> {
 
         // 1. Create a DelegatorVotePlan for each votable note.
         for (record, ik) in &voting_notes {
-            let validator_start_rate_data = start_rate_data
-                .get(&ik)
-                .ok_or_else(|| anyhow!("missing rate data for votable note delegated to {}", ik))?;
+            let Some(validator_start_rate_data) = start_rate_data.get(&ik) else {
+                tracing::debug!("missing rate data for votable note delegated to {}", ik);
+                continue;
+            };
 
             let voting_power_at_vote_start =
                 validator_start_rate_data.unbonded_amount(record.note.amount());