Add StockWaves + 402Sentinel to the ecosystem

[kaditang]

Two production x402 services (Base + Solana, USDC, standard exact rail), added to partners-data/ with logos.

• StockWaves (https://stockwaves.net) — China & global market data + quant signals + a tokenized-stock pre-trade safety gate for AI agents. 13 paid endpoints (real-time Weibo/Baidu/Douyin pulse, structured CN news/events, A-share/HK/US + crypto + macro signals, and an is-this-the-REAL-token copycat/depeg/liquidity gate) + free track-record/preview. x402 pay-per-call, no API key.
• 402Sentinel (https://402sentinel.com) — pre-payment counterparty risk + compliance gate: seller risk scoring, a buyer-side payment firewall (prompt-injection-destination + intent-mismatch blocks), OFAC/FATF compliance, and a tokenized-RWA transfer-restriction gate. 7 paid endpoints + free preview/verified allow-list.

Both self-describe at /.well-known/x402 + /openapi.json + /llms.txt. Category: Services/Endpoints.

🤖 Generated with Claude Code

[cb-heimdall]

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