hermes - 💡(How to fix) Fix Optimization: Correct API key routing for delegate_task [1 pull requests]

Problem

delegate_task should route requests using the delegation-specific provider configuration, but in some setups the API key and request can end up being sent to the wrong endpoint. In particular, an OpenRouter key must never be forwarded to the OpenAI endpoint.

Why this matters

This breaks subagent execution for users who rely on provider-specific delegation settings and causes confusing 401 failures even when the configured key is valid for the intended provider.

Desired behavior

• Resolve delegation.provider and delegation.model independently from the main agent settings.
• Use provider-specific endpoint selection when building the request.
• Ensure credential resolution always matches the selected provider.
• Prevent OpenRouter credentials from being routed to OpenAI endpoints.

Suggested follow-up

• Add regression coverage for mixed-provider configurations.
• Confirm delegation uses the same provider routing logic as the rest of the agent stack.
• Add a clear error when provider and key do not match instead of silently sending the request to the wrong endpoint.