pub fn initialize_runtime() -> Result<Option<&'static str>, RuntimeInitError>Expand description
Validate the Harn-owned environment namespace and initialize process-wide runtime assets through the same bootstrap boundary used by the CLI.
Returns a warning the caller should print once when startup succeeded but
something degraded — today, that caching is off because no cache directory
resolves. A configured value that cannot be honored is an Err instead:
an operator who set HARN_CACHE_DIR gets a hard failure rather than a
silent downgrade to no caching.