Harden TDR demand multipliers for zero-demand inputs#903

Draft

Copilot wants to merge 8 commits into

copilot/fix-tdr-nan-output-issue

Commits on Feb 10, 2026

Initial plan
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Handle zero-demand multipliers in TDR

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gschivley
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Add normal-case TDR multiplier test

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gschivley
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Clarify TDR multiplier tests

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gschivley
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Add debug log for zero-demand multiplier

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Remove redundant TDR test assertion

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Handle zero clustered demand safely

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Rename demand multiplier test set

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gschivley
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