Module SpawnBindTaskWithShutdown 

Spawn a detached tokio task that serves a tonic gRPC Router with graceful shutdown signalling.

Uses tonic::transport::Server::serve_with_shutdown(...) so daemon- style embedders can drain in-flight RPCs before exiting. The simpler crate::Server::SpawnBindTask::Fn runs without a shutdown signal; both shapes are kept side-by-side so embedders pick whichever matches their lifecycle model.

Lifecycle

• The task runs until ShutdownSignal resolves OR the OS socket closes.
• On Ok(()) exit, dev_log marks clean shutdown.
• On Err, dev_log captures the transport error.

Choosing between the two helpers

Need	Helper
Serve until process termination	SpawnBindTask
Serve until a signal fires (recommended for daemons)	SpawnBindTaskWithShutdown

Functions

Fn

Spawn a detached tokio task that serves Router on Address until ShutdownSignal resolves.