Slashing Precompile E2E Test

To test the `unjail` functionality of the Slashing precompile, we need a multi-node setup:
- At least two validator nodes are required: one with high voting power and one with low voting power.
- The test scenario should simulate:
- Validator gets jailed (e.g., via downtime or double-signing)
- The jailed validator calls the precompile to unjail
- State change and validator status should be verified

This test is blocked until we have infrastructure support for multiple validators in the testnet setup.