fix(proof_aggregator): construct transactions following the new eip_7594 for blobs

[MarcosNicolau]

Description

After the Holesky Fusaka update, transactions containing blob sidecars are now being rejected with the following error:

unexpected eip-4844 sidecar after osaka

This occurs because blobs must now be sent according to the new EIP-7594 specification. However, Alloy does not yet support sending blobs in this new format. To work around this limitation, we have switched to using Ethrex for transaction submission.

Notes

• The Rust version in CI has been updated to 1.87.0, as Ethrex depends on features introduced up to that version.
• The beacon node must be run as a supernode (at least in Lighthouse; see here) to properly retrieve blob data.

How to Test

Run the proof aggregator on a chain that includes the Fusaka update and verify that it continues to operate correctly.

Type of change

Please delete options that are not relevant.

• New feature
• Bug fix
• Optimization
• Refactor

Checklist

• “Hotfix” to testnet, everything else to staging
• Linked to Github Issue
• This change depends on code or research by an external entity
  • Acknowledgements were updated to give credit
• Unit tests added
• This change requires new documentation.
  • Documentation has been added/updated.
• This change is an Optimization
  • Benchmarks added/run
• Has a known issue
  • Link to the open issue addressing it
• If your PR changes the Operator compatibility (Ex: Upgrade prover versions)
  • This PR adds compatibility for operator for both versions and do not change crates/docs/examples
  • This PR updates batcher and docs/examples to the newer version. This requires the operator are already updated to be compatible