fix(rollapp): skip missing fraud rollback states

[modelsbridgeaicom-ship-it]

Addresses ROLLAPP-NEW-003 in #282.

Summary

• stops RevertPendingStates from writing a zero-value StateInfo when a finalization queue entry points at missing state info
• logs and skips missing state entries while still removing the stale queue item for the frauded rollapp
• adds regression coverage proving missing rollback state does not create a phantom empty-rollapp/index-0 state and unrelated rollapp queue entries remain pending

Tests

• git diff --check
• git diff --cached --check
• ....\tools\go\bin\go.exe test .\x\rollapp\keeper -run TestRevertPendingStatesSkipsMissingStateInfo -count=1 -v (blocked before package tests by upstream github.com/openmetaearth/ethermint/app/ante/eip712.go: undefined secp256k1.RecoverPubkey and secp256k1.VerifySignature)