pub fn init_metrics() -> Result<(), OrchestratorError>Expand description
Initialise all Prometheus metrics and register them with a private registry.
Must be called once at process startup before any pipeline stage is spawned.
Calling it a second time is a no-op (returns Ok(())).
§Errors
Returns OrchestratorError::Other if metric construction or registry
registration fails (e.g., duplicate descriptor names).
§Panics
This function never panics.