feat: Allow configuring OpenRouter API base via openrouter_api_base s…

[graysonchen]

What this does

Type of change

• Bug fix
• New feature
• Breaking change
• Documentation
• Performance improvement

Scope check

• I read the Contributing Guide
• This aligns with RubyLLM's focus on LLM communication
• This isn't application-specific logic that belongs in user code
• This benefits most users, not just my specific use case

Quality check

• I ran overcommit --install and all hooks pass
• I tested my changes thoroughly
• I updated documentation if needed
• I didn't modify auto-generated files manually (models.json, aliases.json)

API changes

• Breaking change
• New public methods/classes
• Changed method signatures
• No API changes

Related issues

[crmne]

Why?

[graysonchen]

Hey @crmne Yep, for integrate Cloudflare AI Gateway

With this, we can quickly pinpoint issues and access logs.

[crmne]

I see. Since it's OpenAI compatible, instead of adding another configuration option to the library, can't you do the following and use the OpenAI provider instead?

RubyLLM.configure do |config|
  config.openai_api_base = '<cloudflare api gateway url>'
  config.openai_use_system_role = true
end

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.97%. Comparing base (9ae73f7) to head (85c0ec8).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #381   +/-   ##
=======================================
  Coverage   80.97%   80.97%           
=======================================
  Files         114      114           
  Lines        5215     5215           
  Branches     1353     1353           
=======================================
  Hits         4223     4223           
  Misses        992      992           

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