validator-api: add detailed mixnode bond endpoints (#1294)

* validator-api: add mixnodes-detailed endpoint

* validator-api: add detailed variants of active and rewarded set

* explorer-api: cache as mixnode bond detailed

* explorer-api: add in stake-saturation in response

* changelog: update

* rustfmt

* validator-api: rename to MixNodeBondResponse

* validator-api: cache MixNodeBondResponse instead

* validator-api: rename to MixNodeBondAnnotated

* validator-client: fix unused warning

* explorer-api: remove unnecessary clone

* rustfmt

validator-api/src/node_status_api/routes.rs

@@ -147,7 +147,7 @@ pub(crate) async fn get_mixnode_reward_estimation(
         let node_reward_params = NodeRewardParams::new(0, uptime.u8() as u128, status.is_active());
         let reward_params = RewardParams::new(reward_params, node_reward_params);
 
-        match bond.estimate_reward(&reward_params) {
+        match bond.mixnode_bond.estimate_reward(&reward_params) {
             Ok(reward_estimate) => {
                 let reponse = RewardEstimationResponse {
                     estimated_total_node_reward: reward_estimate.total_node_reward,
@@ -181,11 +181,13 @@ pub(crate) async fn get_mixnode_stake_saturation(
 ) -> Result<Json<StakeSaturationResponse>, ErrorResponse> {
     let (bond, _) = cache.mixnode_details(&identity).await;
     if let Some(bond) = bond {
+        // Recompute the stake saturation just so that we can confidentaly state that the `as_at`
+        // field is consistent and correct. Luckily this is very cheap.
         let interval_reward_params = cache.epoch_reward_params().await;
         let as_at = interval_reward_params.timestamp();
         let interval_reward_params = interval_reward_params.into_inner();
 
-        let saturation = bond.stake_saturation(
+        let saturation = bond.mixnode_bond.stake_saturation(
             interval_reward_params.circulating_supply(),
             interval_reward_params.rewarded_set_size() as u32,
         );