DeepSeek-V3.1

[lastshogun13]

Description of Changes

This PR adds support for DeepSeek-V3.1 model (deepseek.v3-v1:0) to the Generative AI Use Cases application.

Changes include:

• Added deepseek.v3-v1:0 model configuration to the backend model registry (packages/cdk/lambda/utils/models.ts)
• Added model metadata for DeepSeek-V3.1 in the common package (packages/common/src/application/model.ts)
  • Model supports text and document features (MODEL_FEATURE.TEXT_DOC)
  • Display name: "DeepSeek-V3.1"
• Updated deployment option documentation in English, Japanese, and Korean (docs/*/DEPLOY_OPTION.md)
  • Added deepseek.v3-v1:0 to the list of supported text generation models
  • Added configuration examples with us-west-2 region specification
  • Added to cross-region inference examples and config preset examples

Impact on existing users:

• N/A

Checklist

• Modified relevant documentation
• Verified operation in local environment
• Executed npm run cdk:test and if there are snapshot differences, execute npm run cdk:test:update-snapshot to update snapshots

Related Issues

N/A

[tbrand]

I'm sorry. Actually, we were having our new employee handle this matter as part of their onboarding process. So, would it be okay if we skip the review? We will have the Qwen addition reviewed separately.

[lastshogun13]

No problem at all! Please feel free to skip the review.

Regarding this PR, you can either close it or merge it into the onboarding
materials - whichever works best for your team. I'll leave that decision
up to you.

We're looking forward to the implementation of Qwen and Deepseek V3.1
features.

[lastshogun13]

#1315
The above PR has been completed, so I will close this PR.