docs: record Human Zine dogfood

[BrickerP]

Summary

• record the completed live Human Zine self-dogfood evidence
• capture the responsive, recruiter-route, and link verification results
• define the next loop as a five-person unaided recall test

Why

The repository documentation still described the earlier local acceptance state and an obsolete shared LOOP / LEDGER visual-system direction. These updates make the docs reflect the completed live verification and the remaining qualitative participant question.

Impact

Documentation only. No product or runtime code changes.

Validation

• git diff --check
• verified the commit contains only docs/creative/06-dogfood.md and docs/creative/07-next-loop.md
• no local build or test run, per repository instructions