Fix GitHub model fetch

[BrandonStudio]

Refactor OpenAICompatibleFactory

💻 变更类型 | Change Type

• ✨ feat
• 🐛 fix
• ♻️ refactor
• 💄 style
• 👷 build
• ⚡️ perf
• 📝 docs
• 🔨 chore

🔀 变更说明 | Description of Change

• Fix GitHub models method.
• Refactor models parameter of OpenAICompatibleFactory.

📝 补充信息 | Additional Information

Fix #4547 (3/3).

This PR should not be merged before #4260.

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[codecov]

Codecov Report

Attention: Patch coverage is 74.39024% with 21 lines in your changes missing coverage. Please review.

Project coverage is 92.50%. Comparing base (e1f6a3a) to head (3d0149e).
Report is 21 commits behind head on main.

Files with missing lines	Patch %	Lines
src/libs/agent-runtime/github/index.ts	58.82%	21 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4645      +/-   ##
==========================================
+ Coverage   92.48%   92.50%   +0.02%     
==========================================
  Files         511      517       +6     
  Lines       36614    36905     +291     
  Branches     3388     2447     -941     
==========================================
+ Hits        33862    34140     +278     
- Misses       2752     2765      +13     

Flag	Coverage Δ
app	92.50% <74.39%> (+0.02%)	⬆️
server	97.26% <ø> (+<0.01%)	⬆️

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