[sui-system] add voting power to epoch info event (#10124)

## Description 

We should include the voting power of validators in emitted events too.

## Test Plan 

How did you test the new or updated feature?

---
If your changes are not user-facing and not a breaking change, you can
skip the following section. Otherwise, please indicate what changed, and
then add to the Release Notes section as highlighted during the release
process.

### Type of Change (Check all that apply)

- [ ] user-visible impact
- [ ] breaking change for a client SDKs
- [ ] breaking change for FNs (FN binary must upgrade)
- [ ] breaking change for validators or node operators (must upgrade
binaries)
- [ ] breaking change for on-chain data layout
- [ ] necessitate either a data wipe or data migration

### Release notes

crates/sui-framework/docs/validator_set.md

@@ -7,6 +7,7 @@
 
 -  [Struct `ValidatorSet`](#0x3_validator_set_ValidatorSet)
 -  [Struct `ValidatorEpochInfoEvent`](#0x3_validator_set_ValidatorEpochInfoEvent)
+-  [Struct `ValidatorEpochInfoEventV2`](#0x3_validator_set_ValidatorEpochInfoEventV2)
 -  [Struct `ValidatorJoinEvent`](#0x3_validator_set_ValidatorJoinEvent)
 -  [Struct `ValidatorLeaveEvent`](#0x3_validator_set_ValidatorLeaveEvent)
 -  [Constants](#@Constants_0)
@@ -256,6 +257,94 @@ each validator, emitted during epoch advancement.
 </dl>
 
 
+</details>
+
+<a name="0x3_validator_set_ValidatorEpochInfoEventV2"></a>
+
+## Struct `ValidatorEpochInfoEventV2`
+
+V2 of ValidatorEpochInfoEvent containing more information about the validator.
+
+
+<pre><code><b>struct</b> <a href="validator_set.md#0x3_validator_set_ValidatorEpochInfoEventV2">ValidatorEpochInfoEventV2</a> <b>has</b> <b>copy</b>, drop
+</code></pre>
+
+
+
+<details>
+<summary>Fields</summary>
+
+
+<dl>
+<dt>
+<code>epoch: u64</code>
+</dt>
+<dd>
+
+</dd>
+<dt>
+<code>validator_address: <b>address</b></code>
+</dt>
+<dd>
+
+</dd>
+<dt>
+<code>reference_gas_survey_quote: u64</code>
+</dt>
+<dd>
+
+</dd>
+<dt>
+<code>stake: u64</code>
+</dt>
+<dd>
+
+</dd>
+<dt>
+<code><a href="voting_power.md#0x3_voting_power">voting_power</a>: u64</code>
+</dt>
+<dd>
+
+</dd>
+<dt>
+<code>commission_rate: u64</code>
+</dt>
+<dd>
+
+</dd>
+<dt>
+<code>pool_staking_reward: u64</code>
+</dt>
+<dd>
+
+</dd>
+<dt>
+<code>storage_fund_staking_reward: u64</code>
+</dt>
+<dd>
+
+</dd>
+<dt>
+<code>pool_token_exchange_rate: <a href="staking_pool.md#0x3_staking_pool_PoolTokenExchangeRate">staking_pool::PoolTokenExchangeRate</a></code>
+</dt>
+<dd>
+
+</dd>
+<dt>
+<code>tallying_rule_reporters: <a href="">vector</a>&lt;<b>address</b>&gt;</code>
+</dt>
+<dd>
+
+</dd>
+<dt>
+<code>tallying_rule_global_score: u64</code>
+</dt>
+<dd>
+
+</dd>
+</dl>
+
+
 </details>
 
 <a name="0x3_validator_set_ValidatorJoinEvent"></a>
@@ -2606,11 +2695,12 @@ including stakes, rewards, performance, etc.
             <b>if</b> (<a href="_contains">vector::contains</a>(slashed_validators, &validator_address)) 0
             <b>else</b> 1;
         <a href="_emit">event::emit</a>(
-            <a href="validator_set.md#0x3_validator_set_ValidatorEpochInfoEvent">ValidatorEpochInfoEvent</a> {
+            <a href="validator_set.md#0x3_validator_set_ValidatorEpochInfoEventV2">ValidatorEpochInfoEventV2</a> {
                 epoch: new_epoch,
                 validator_address,
                 reference_gas_survey_quote: <a href="validator.md#0x3_validator_gas_price">validator::gas_price</a>(v),
                 stake: <a href="validator.md#0x3_validator_total_stake_amount">validator::total_stake_amount</a>(v),
+                <a href="voting_power.md#0x3_voting_power">voting_power</a>: <a href="validator.md#0x3_validator_voting_power">validator::voting_power</a>(v),
                 commission_rate: <a href="validator.md#0x3_validator_commission_rate">validator::commission_rate</a>(v),
                 pool_staking_reward: *<a href="_borrow">vector::borrow</a>(pool_staking_reward_amounts, i),
                 storage_fund_staking_reward: *<a href="_borrow">vector::borrow</a>(storage_fund_staking_reward_amounts, i),

crates/sui-framework/packages/sui-system/sources/validator_set.move

@@ -85,6 +85,21 @@ module sui_system::validator_set {
         tallying_rule_global_score: u64,
     }
 
+    /// V2 of ValidatorEpochInfoEvent containing more information about the validator.
+    struct ValidatorEpochInfoEventV2 has copy, drop {
+        epoch: u64,
+        validator_address: address,
+        reference_gas_survey_quote: u64,
+        stake: u64,
+        voting_power: u64,
+        commission_rate: u64,
+        pool_staking_reward: u64,
+        storage_fund_staking_reward: u64,
+        pool_token_exchange_rate: PoolTokenExchangeRate,
+        tallying_rule_reporters: vector<address>,
+        tallying_rule_global_score: u64,
+    }
+
     /// Event emitted every time a new validator joins the committee.
     /// The epoch value corresponds to the first epoch this change takes place.
     struct ValidatorJoinEvent has copy, drop {
@@ -1176,11 +1191,12 @@ module sui_system::validator_set {
                 if (vector::contains(slashed_validators, &validator_address)) 0
                 else 1;
             event::emit(
-                ValidatorEpochInfoEvent {
+                ValidatorEpochInfoEventV2 {
                     epoch: new_epoch,
                     validator_address,
                     reference_gas_survey_quote: validator::gas_price(v),
                     stake: validator::total_stake_amount(v),
+                    voting_power: validator::voting_power(v),
                     commission_rate: validator::commission_rate(v),
                     pool_staking_reward: *vector::borrow(pool_staking_reward_amounts, i),
                     storage_fund_staking_reward: *vector::borrow(storage_fund_staking_reward_amounts, i),