docs(SUP-1501): document GBrain memory operating pattern

[levineam]

Summary

Updates the public jarvOS docs after the GBrain/QMD/memory-wiki validation stack:

• root README explains the recommended vault -> QMD -> curated GBrain -> graph recall -> runtime recall-bundle pattern
• modules README documents the expanded @jarvos/gbrain responsibilities and operating loop
• OpenClaw runtime README clarifies memory/knowledge wiring and memory-wiki's diagnostic role
• starter kit adds retrieval eval and recall-bundle verification before prompt injection
• architecture note records the validated layered retrieval pattern and public/private boundary

This is docs-only and intentionally does not include private manifests, eval questions, generated pages, or note content.

Validation

• node tests/modules-smoke-test.js
• bash scripts/smoke-test.sh
• npm test
• git diff --check
• CI-style markdownlint command with the same disabled rules as .github/workflows/ci.yml

Paperclip

SUP-1501

Stacked on PR #24 / branch sup-1504-gbrain-recall-bundle.

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Use a path that exists from the OpenClaw workspace

In the OpenClaw setup described above, the jarvOS repo is copied into an OpenClaw workspace and only the core/templates are placed at the workspace root; the runtime itself will normally run from that workspace root, where modules/jarvos-gbrain/... does not exist. This recipe will therefore fail with MODULE_NOT_FOUND unless the user happens to run it from the jarvOS clone; use the installed jarvos-gbrain bin or an explicit path to the clone instead.

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