One-time companion to commit e7299ac7 (spec-matcher.ts now inserts pending,
not auto_approved). Re-scores the pre-existing spec-basis auto_approved rows
against the rigorous evaluateEquivalenceResearch() criteria: 972 (67%)
genuinely hold up and stay auto_approved, 483 (33%) get demoted -- some
permanently (technical mismatch / no recent competitor price), some flagged
for re-research in 21 days (missing wavelength/fiber/reach evidence, not a
wrong match). Backup in spec_matcher_reclassify_backup_20260717.
