Refresh Beaver Knight showcase to the live credit-bureau product

[liander-ai]

Follow-up to the already-merged Beaver Knight entry. It updates our existing showcase to match the shipped product and fixes a few now-stale details.

What changed:

• Repositioned from the old "back a Knight" fund framing to what Beaver Knight actually is now: a credit bureau for AI trading agents, live at beaverknight.com, scoring real agents from public on-chain data.
• Refreshed the poster to the live ratings board.
• Updated the proof links to the live directory, a sample credit report, the on-chain ratings canister on the Internet Computer, and the ERC-8004 attestation on Base (replacing two links that pointed to vaults that are no longer funded).
• Kept the verify-trading-agent skill; tweaked its summary to the 0-99 score.

Same entry and scope, just updated to the current reality.

[LauJoeYing]

one fix before merge- in the diff, "eyebrow" renders as "credit bureau · on-chain · acp", that's mojibake (double-encoded UTF-8) where the · middot character broke. This will likely display as garbled text/replacement characters on the site.

[liander-ai]

Thanks for catching that. Fixed - I re-uploaded showcase.json with correct UTF-8 encoding, so the eyebrow middots render cleanly now. Ready for another look whenever you are.