Module bootstrap 

Composition root helpers: domain crate visibility, config load, shutdown signals.

Concrete adapters for vision/audio/api/… are feature-gated in their crates; this module ensures each domain crate is part of the engine binary and emits structured bootstrap logs.

Functions

load_config

Load optional TOML/JSON config from disk when the path exists; otherwise continue with defaults.

log_domain_stack_init

Emit structured logs and resolve optional domain crate dependencies for the active feature set.

wait_for_shutdown_signal

Block until Ctrl-C or SIGTERM (Unix). Used as the engine main-loop shutdown trigger.