Stabilize native stream-5 hostile bytes trace test

[czarcas7ic]

The test native_stream5_hostile_bytes_disconnect_with_traceable_reasons is currently flaky in the PR unit-test lane and has been temporarily ignored.

Observed failure:

• workflow: Unit Tests
• job: stable on ubuntu-latest
• failing test: zebra-network::zakura::testkit::cluster::tests::native_stream5_hostile_bytes_disconnect_with_traceable_reasons
• error: WaitError { description: "native stream-5 oversize trace", timeout: 5s }

The failure happened after the hostile peer sent an oversized stream-5 frame. The test waits for a ratelimit JSONL row with event = "frame.oversize" and stream_kind = "header_sync", but under CI load that trace row was not observed before the fixed 5 second deadline.

Follow up:

• Determine whether the trace row is delayed, dropped, or the peer disconnect path is racing the trace writer.
• Re-enable the test once it is event-driven or uses a deterministic synchronization point instead of a short fixed trace-read timeout.