Add event_log.rs with EventLog (capped VecDeque, monotonic ids, mark_read,
snapshot/restore) and EventLogState. Register mod in main.rs. Stub
Cmd::EventLog and Cmd::MarkRead arms in server.rs to keep the exhaustive
match compiling; full wiring follows in Task 4.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Process-wide serial lock around the socket-binding and PTY-spawning
integration tests in spaceshd. Running several at once on a many-core
box starved each other's async tasks and tripped timing assumptions,
causing ~1/10 flakes under cargo test --workspace. Unit tests stay
parallel. 0/20 spaceshd + 0/5 workspace runs after the change.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
vasyansk
