Module orchestrator 

Main distributed orchestrator implementation

Implements a real, locally-verifiable node registry and workflow scheduler. Actual dispatch of circuits over a network to remote quantum devices is out of scope for a pure-local implementation (it requires a genuine network transport to real, external nodes), so DistributedQuantumOrchestrator::execute_distributed performs real local validation (node availability, capability checks) and then returns an honest error describing the missing transport instead of fabricating a successful DistributedExecutionResult.