knb_stats: validate PC interpretations + rank-3 reconstruction + writeup PC sections

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pca_svd: exclude torn-down powersurge from the PCA, trim attractions.io
category names (trailing-space gotcha), time-side validation of PC1-PC3
interpretations, per-ride R^2 of the rank-3 reconstruction, blog-ready
PC2xPC3 scatter. writeup: PC1/PC2/PC3 narrative sections.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

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wes

2026-07-07 22:22:37 -04:00

co-authored by Claude Opus 4.8

parent 5c09528df7

commit 94a91e29ad

2 changed files with 1136 additions and 195 deletions

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