- Use tini as PID 1 in wrenn-init.sh so zombie processes are reaped
and signals are forwarded correctly to envd
- Set standard PATH in wrenn-init.sh so child processes spawned by envd
can find common binaries (fixes "nice: ls command not found")
- Add envdclient.Init() to POST /init on envd after every boot/resume,
syncing the guest clock via unix.ClockSettime — critical after snapshot
resume where the guest clock is frozen
- Run Init in a background goroutine so it doesn't block the CreateSandbox
RPC response; a slow Init (vCPU busy with envd startup) was causing the
RPC context to be canceled before the response reached the control plane
- Update rootfs-from-container.sh and update-debug-rootfs.sh to inject
tini into the rootfs, checking the container image and host first,
downloading from GitHub releases as fallback
Implement the host agent as a Connect RPC server that orchestrates
sandbox creation, destruction, pause/resume, and command execution.
Includes sandbox manager with TTL-based reaper, network slot allocator,
rootfs cloning, hostagent proto definition with generated stubs, and
test/debug scripts. Fix Firecracker process lifetime bug where VM was
tied to HTTP request context instead of background context.
