Virtual NR Routing#380

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steiltre wants to merge 2 commits intollnl:v0.9-devfrom

steiltre:feature/NR_custom_node_size

Commits on Sep 10, 2025

Adds virtual NR routing scheme that functions similarly to NR but with an environment variable to control the number of ranks assigned to a virtual node for use in routing calculations
steiltre
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* handles case of last virual node not being full
steiltre
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