[geroldsteiner67]

Summary

• Replace the stale, 25-minute hybrid example test with an isolated two-block-epoch fixture that runs modal node run-hybrid.
• Check mining, epoch-2 nominee selection, and Shoal loop startup with bounded waits; add the scenario to Rust CI.
• Update the public implementation checklist with the exact scope of this solo-node proof.

Local validation

• bash -n for both edited scripts
• tests/network/10-hybrid-devnet1/test.sh: 6/6 passed (clean run, 29 seconds)
• git diff --check

This does not prove multi-node propagation or public-testnet finality.