Add fast `trap_burden` mode with lightweight bulk/original-basis computation#371

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charlesmartin14 wants to merge 3 commits intomasterfrom

codex/investigate-pr370-workflow-performance-issues

Commits on May 1, 2026

Add fast trap burden mode with cached SVD path
charlesmartin14
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Use randomized well-spaced bulk sampling in fast trap mode
charlesmartin14
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Default trap analysis to fast mode with deterministic bulk sampling
charlesmartin14
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