docs(seo): 2026-11 insulation content plan + approved models brief + brand research
2026-11-insulation-content-plan.md - TASK-200..212, PHASE 2b scope
2026-11-insulation-models-plan.md - inventory: 8 pages, 44 models, 14 foil, 40 photos
2026-11-models-brief.md - owner-approved page-by-page model copy (2026-11-11)
2026-11-models-spec.json - machine-readable model/badge spec
research/brand-models-{A,B}.md/.json, 3t-catalog.json, 3t-specs.json - source
research with vendor datasheet links (3T, Aeroflex, Maxflex, ROCKWOOL, N-Lez)
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