Docs: Document OpenRouter attribution headers (HTTP-Referer, X-Title)

[continue]

Summary

PRs #11857 and #11991 added support for sending attribution headers to OpenRouter API requests:

• HTTP-Referer: https://www.continue.dev/
• X-OpenRouter-Title: Continue
• X-OpenRouter-Categories: ide-extension

These headers identify Continue in OpenRouter's activity dashboard and App Showcase.

Documentation Needed

1. Add a note to the OpenRouter provider documentation explaining:

   • Continue automatically sends attribution headers to OpenRouter
   • Users can see "Continue" in their OpenRouter activity dashboard
   • User-configured requestOptions.headers can override these defaults

2. This is useful information for users who want to understand their API usage in OpenRouter's dashboard

Related

• PR: feat(openrouter): send HTTP-Referer and X-Title headers to identify app #11857
• PR: feat(openrouter): send HTTP-Referer and X-Title headers in core/llm OpenRouter class #11991

Generated with Continue

Co-Authored-By: Continue noreply@continue.dev
Co-authored-by: bekahhw rhawrot@gmail.com