feat: add optional Adanos market sentiment provider

[alexander-schneider]

Summary

• add an optional Adanos provider to the default strategy for structured Reddit stock and crypto sentiment
• query trending stocks and every configured crypto symbol with explicit UTC date windows
• cache each source independently for eight hours, retry failed refreshes, and fail open with bounded stale-data downweighting
• document ADANOS_API_KEY setup and keep the integration fully disabled when no key is configured

Equity tradability and allowed exchanges remain enforced by MAHORAGA's existing PolicyBroker immediately before orders. The provider only contributes research signals.

Adanos API keys: https://adanos.org/register
API documentation: https://api.adanos.org/docs

Validation

• npm run check -- --diagnostic-level=error
• node node_modules/typescript/bin/tsc --noEmit
• node node_modules/vitest/vitest.mjs run (210 passed)
• structured autoreview: clean, no actionable findings

[greptile-apps]

Your trial has ended. Reactivate Greptile to resume code reviews.