fix: resolve getSlashingAddress removed from SDK in validator-history

[ygd58]

Summary

Fixes genlayer staking validator-history failing with client.getSlashingAddress is not a function.

Root Cause

getSlashingAddress() was removed from genlayer-js SDK in v0.39+. The validatorHistory.ts command still called it, causing an immediate crash before any history could be fetched.

Fix

Replaced client.getSlashingAddress() with a dynamic lookup via viem readContract — reads the idleness contract address from the consensusMainContract on-chain. Falls back to the staking contract address if resolution fails, ensuring reward events still display correctly.

Related Issue

Fixes #341

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: dd6c3f1a-8492-4ac7-a831-b1023b79aca3

📥 Commits

Reviewing files that changed from the base of the PR and between ca083ab and 193cf21.

📒 Files selected for processing (1)

• src/commands/staking/validatorHistory.ts

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