✨ feat: Add Ai21Labs model support in Bedrock

[hezhijie0327]

💻 变更类型 | Change Type

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

🔀 变更说明 | Description of Change

增加对 Bedrock 中 ai21.jamba-instruct-v1:0 模型的对话支持

Note: 仅在 us-east-1 区域可用

📝 补充信息 | Additional Information

[vercel]

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[codecov]

Codecov Report

Attention: Patch coverage is 55.39568% with 62 lines in your changes missing coverage. Please review.

Project coverage is 91.66%. Comparing base (743df51) to head (13f1121).
Report is 38 commits behind head on main.

Files with missing lines	Patch %	Lines
src/libs/agent-runtime/bedrock/index.ts	9.25%	49 Missing ⚠️
...c/libs/agent-runtime/utils/streams/bedrock/ai21.ts	84.33%	13 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3808      +/-   ##
==========================================
- Coverage   91.78%   91.66%   -0.13%     
==========================================
  Files         453      456       +3     
  Lines       30201    30581     +380     
  Branches     2084     3109    +1025     
==========================================
+ Hits        27719    28031     +312     
- Misses       2482     2550      +68     

Flag	Coverage Δ
app	91.66% <55.39%> (-0.13%)	⬇️
server	97.36% <ø> (ø)

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