fix: update Dune service description

[va3093]

Summary

• Updates the Dune service description in services.ts to better reflect the full scope of available data
• Rebased onto main; removed generated files (discovery.json, llms.txt) that were deleted on main

Before

Execute SQL queries on Dune and retrieve results or CSV exports from completed executions.

After

Query across raw transaction data, decoded smart contract events, stablecoin flows, RWA tracking, protocol analytics, DeFi positions, NFT activity, blockchain market research, and whatever is trending in crypto.

[github-actions]

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📖 Contributing guide · 🔍 MPPScan · 📄 Protocol docs

[vercel]

@va3093 is attempting to deploy a commit to the Tempo Team on Vercel.

A member of the Team first needs to authorize it.

[brendanjryan]

@va3093 -- one merge conflict.

I removed these here: #459 so this should happen less frequently

[brendanjryan]

Superseded by a rebased PR without generated files.