chore: network topology test matrix

[just-mitch]

As a QA engineer, I want a comprehensive test matrix for different network topologies so that I can ensure the system works under various configurations.

- [ ] Define test scenarios (varying numbers of nodes, validators, PXEs)
- [ ] Implement tests for block proposal, proving, and finalization
- [ ] Create tests for network resilience (node failures, slow connections)
- [ ] Integrate tests with CI pipeline