Add Docker E2E bundle relay tests

[cytadela8-ai]

Summary

• add a Docker-based local E2E harness that boots Anvil plus two pinned zksync-os-server chains and runs the first bundle relay flow with bash scripts/test-e2e.sh --flow bundle-relay
• add bundle relay integration coverage for a successful contract-backed relay and a missing-receipt failure, including the helper code and fixture bytecode needed to run it locally and in CI
• fix the current CLI compatibility issues needed for the pinned local stack by updating the InteropBundleSent bundle attribute shape and setting explicit EIP-1559 fee caps for send and relay
• document the harness, repo structure, and the exact test command in README.md and DEV.md

Test Plan

• cargo clippy --test bundle_relay -- -D warnings
• bash scripts/test-e2e.sh --flow bundle-relay