Note

Introduces a batched FIFO queue and switches BFS to use it (except SmartGraph coordinator), updates tracing instantiations, and tweaks inspection/memory accounting.

• Graph Queues:
  • New BatchedFifoQueue implementing batched FIFO with separate step/expansion deques and resource tracking.
  • BatchedLifoQueue: fix clear() to properly decrease memory per stored variant.
  • ExpansionMarker: extend inspect to include id for Expansion.
• Tracing:
  • Add QueueTracer instantiations for BatchedFifoQueue with SingleServerProviderStep, ClusterProviderStep, and enterprise::SmartGraphStep.
• Algorithm Wiring:
  • Update BFSConfiguration to use BatchedFifoQueue by default; keep FifoQueue for enterprise::SmartGraphProvider<ClusterProviderStep>; propagate through QueueTracer when tracing is enabled.

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