Response drift: opinion — config base URL uses port 8443, live API only reachable on port 443

[realfishsam]

Summary

opinion/config.ts sets the base URL with an explicit :8443 port (https://proxy.opinion.trade:8443/openapi). Live connectivity checks confirm port 8443 is unreachable (connection refused / timeout); the same host on port 443 responds correctly.

Impact

HIGH — the adapter is non-functional in production. All opinion fetches fail at the TCP connection step before any HTTP exchange occurs.

Evidence

• Config base URL: https://proxy.opinion.trade:8443/openapi
• Port 8443: unreachable (connection refused)
• Port 443 (https://proxy.opinion.trade/openapi): responds with valid JSON

Affected files

• core/src/exchanges/opinion/config.ts — base URL string with :8443
• core/src/exchanges/opinion/fetcher.ts — consumes config base URL for all requests

Fix direction

Remove :8443 from the base URL constant in config.ts so requests go to the standard HTTPS port.