Add Bug Bounty Intelligence as x402 merchant example — pre-deployment security scanning

Following the pattern of #34/#36/#38 — another merchant example for this sample, this time for pre-deployment smart contract security.

**Bug Bounty Intelligence**: an x402-paid endpoint that scans Solidity contracts for the vulnerability classes most likely to actually get exploited, trained on 27,681 real accepted findings from Sherlock and Code4rena audit competitions (not synthetic/theoretical patterns).

- Endpoint: https://wazir-x402.duckdns.org/api/bug-intel
- Price: 5 USDC per scan, Base mainnet
- Use case: an AgentCore agent could call this before it interacts with an unfamiliar contract, the same way it might check a domain reputation before visiting a URL.

Happy to adjust format/fields to match how the other examples are listed.

Review how the merchant examples are presented in issues #34, #36, and #38, then find the corresponding example listing or entry point in the repository. Add Bug Bounty Intelligence with its endpoint, 5 USDC Base mainnet price, and pre-deployment Solidity scanning use case, matching the existing format.

Written by the indexing model from the issue text.