add deepseek-coder-v2 in siliconflow

[senseb]

Checklist:

Important

Please review the checklist below before submitting your pull request.

• Please open an issue before creating a PR or link to an existing issue
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I ran dev/reformat(backend) and cd web && npx lint-staged(frontend) to appease the lint gods

Description

Describe the big picture of your changes here to communicate to the maintainers why we should accept this pull request. If it fixes a bug or resolves a feature request, be sure to link to that issue. Close issue syntax: Fixes #<issue number>, see documentation for more details.

Close #6148

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update, included: Dify Document
• Improvement, including but not limited to code refactoring, performance optimization, and UI/UX improvement
• Dependency upgrade

Testing Instructions

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• Test A
• Test B

[crazywoola]

Please fix the lint errors in CI

[crazywoola]

https://github.com/deepseek-ai/DeepSeek-Coder-V2

It seems it has upgrade it's context length to 128k

Link #6215

@senseb

[senseb]

@takatost Could you help review the code?

[senseb]

128k

currently, siliconflow support 32K context length. see: https://siliconflow.cn/models#models

[crazywoola]

Hello please resolve that conversation, once it's resolved, we can merge it into main.

[senseb]

@takatost i have resolve the aforementioned conversation, please check again.

[takatost]

thanks!