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Model fabric response hop latency for PE-internal operations: - HBM_CTRL sends PeDmaMsg response on reverse path instead of direct done signal - PE_CPU sends ResponseMsg via NOC→M_CPU on kernel completion - Add NOC→PE_DMA and PE_CPU→NOC edges in topology builder - Make HBM BW test assertions dynamic based on topology efficiency Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>