Log topic on ethereum side

[vgeddes]

We missed this.

[yrong]

+1

[yrong]

Some tests failed

forge test --match-test testSubmitRegisterPNA -vvvv

which requires test fixture from local setup.

@vgeddes You can leave it to me, I'll update the relayer and the text fixture.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

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Additional details and impacted files

@@          Coverage Diff          @@
##             v2    #1404   +/-   ##
=====================================
  Coverage      ?   78.73%           
=====================================
  Files         ?       23           
  Lines         ?      884           
  Branches      ?      133           
=====================================
  Hits          ?      696           
  Misses        ?      163           
  Partials      ?       25           

Flag	Coverage Δ
solidity	78.73% <100.00%> (?)

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[yrong]

Tested this PR alongside vgeddes/polkadot-sdk#35 using a local setup. The outbound smoke test works as expected.

I think we can merge these two PRs now.