[pablo-tech]

What changed and why

Structural-edit checklist

(From CONTRIBUTING.md — only applies if this PR adds, removes, or rewires
nodes; skip for prose-only fixes.)

• Required frontmatter present: node, kind, label, inputs, basis, tags.
• kind and tags agree (kind: leaf implies tags: [dag/leaf], etc).
• Every inputs entry has a matching [[wikilink]] in ## Inputs, and vice versa.
• No new orphaned source nodes (nothing lists it as an input).
• {{PRODUCT_NAME}} used instead of the literal product name anywhere it would otherwise
  appear.
• ## Inputs/## Reasoning present or absent per
  ARCHITECTURE.md § Section-presence convention.
• scripts/validate-vault.sh passes locally.