docs(readme): add whitepaper pdf and shrink banner

[echobt]

Summary

Add the operator-published Cortex whitepaper at repo root and a README link under the badges. Resize the README banner so it no longer dominates the page.

• Root whitepaper.pdf is the real PDF from https://165-227-91-243.sslip.io/cortex-whitepaper-bounty-and-proof.pdf (%PDF-1.5, 785105 bytes).
• SHA-256: 1456e2b23a779425f9c2e875bc1469cb6e086c738953dec0f103a71967eb0334 (Mathis tip 1456e2b2…0334).
• README: <a href="whitepaper.pdf">Whitepaper</a> under the badges (repo-root relative; GitHub blob/raw resolve it).
• assets/banner.jpg shrunk from 1500×500 / 122KB to 720×240 / 38KB, with width="720" on the README <img>.

Does not touch ceremony secrets, proof InferenceOffer, or emission.

Greptile

Every PR is reviewed by Greptile before merge. Config: .greptile/.

• Greptile has reviewed this PR; findings are fixed or answered
• If the bot was silent, I commented @greptileai review

Test plan

• file whitepaper.pdf → PDF document, version 1.5
• sha256sum whitepaper.pdf = 1456e2b23a779425f9c2e875bc1469cb6e086c738953dec0f103a71967eb0334
• README contains <a href="whitepaper.pdf">Whitepaper</a>
• Banner is 720×240 JPEG (~38KB vs prior 122KB)
• cargo test --workspace — not run; docs/assets only
• cargo fmt --all -- --check — not applicable
• Clippy / deny / xtask gates — not applicable (no crate changes)

Risk

None for deploy, miner CVM measurement, signature domain, or emission. README + static assets only.

Naming

I did not rename BASE_* environment variables, deployed host paths
(/opt/base, /run/base, …), GHCR baseintelligence/base package names, or
base-*-v1 cryptographic domain tags, unless this PR’s purpose is a coordinated
cutover documented in docs/NAMING.md.

  

[greptile-apps]

Greptile Summary

Summary

• Adds the Cortex whitepaper and a README link to it.
• Replaces the banner with a smaller 720×240 JPEG and displays it at its intrinsic 720-pixel width.
• The README references resolve to valid repository assets.

Confidence Score: 5/5

Safe to merge.

The changed README link, PDF, and banner asset were checked against the parent and current revisions; the linked assets exist, have valid file signatures, and the documented banner width matches its intrinsic dimensions.

Files Needing Attention: None.

T-Rex Logs

What T-Rex did

• Validated the pre-run baseline state for README assets, confirming the parent revision lacked the new whitepaper link and explicit banner sizing.
• Authored and ran the PR 225 assets validation script, capturing before and after logs that record the baseline and the updated results.
• After running, the updated README asset references were validated: whitepaper.pdf is a 785105-byte PDF with valid signatures; assets/banner.jpg is a 38316-byte JPEG with 720×240 dimensions; and the README declares a 720px banner width, matching the asset.
• The executable check was preserved, along with its before-and-after output.

_{Ran code and verified through T-Rex}

Important Files Changed

Filename	Overview
README.md	Adds the whitepaper link and declares the banner at 720 pixels wide.
assets/banner.jpg	Replaces the banner with a 720×240 JPEG.
whitepaper.pdf	Adds the Cortex whitepaper PDF.

_{Reviews (1): Last reviewed commit: "docs(readme): add whitepaper pdf and shr..." | Re-trigger Greptile}