feat: add n1n.ai provider

[n1n-api]

This PR adds n1n.ai as a model provider.

Changes:

• Added N1N to ModelClass enum in Thrift and Go.
• Registered n1n provider in mode_provider.go.
• Registered n1n model builder (using OpenAI compatibility) in model_builder.go.
• Added model_template_n1n.yaml.

[CLAassistant]

All committers have signed the CLA.

[fanlv]

Have you tested adding n1n.ai models through the management page?

[fanlv]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.

n1n seems not to be a GitHub user. You need a GitHub account to be able to sign the CLA. If you have already a GitHub account, please add the email address used for this commit to your account.
You have signed the CLA already but the status is still pending? Let us recheck it.

CLA 也签一下。

[n1n-api]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
n1n seems not to be a GitHub user. You need a GitHub account to be able to sign the CLA. If you have already a GitHub account, please add the email address used for this commit to your account.
You have signed the CLA already but the status is still pending? Let us recheck it.

CLA 也签一下。

已经签好了～

[n1n-api]

Have you tested adding n1n.ai models through the management page?

Yea..we have customers tested on that :)

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 15 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
backend/bizpkg/config/modelmgr/mode_provider.go	0.00%	11 Missing ⚠️
...ckend/api/model/app/developer_api/developer_api.go	0.00%	4 Missing ⚠️

Files with missing lines	Coverage Δ
backend/bizpkg/llm/modelbuilder/model_builder.go	0.00% <ø> (ø)
...ckend/api/model/app/developer_api/developer_api.go	0.08% <0.00%> (-0.01%)	⬇️
backend/bizpkg/config/modelmgr/mode_provider.go	0.00% <0.00%> (ø)

... and 3 files with indirect coverage changes

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[fanlv]

default_icon/n1n.png 这个文件没有上传

[fanlv]

这个文件夹下面的 模版没用了，现在都是通过管理后台 动态去添加 模型了。不用加这个文件。

[fanlv]

license/cla 状态检查也有点问题，一直 waiting，可能要周一找其他同学看下。

[n1n-api]

default_icon/n1n.png 这个文件没有上传

谢谢！我把图片也传到附件了，是不是需要重新提交一下...

[n1n-api]

license/cla 状态检查也有点问题，一直 waiting，可能要周一找其他同学看下。

辛苦麻烦您了～

[fanlv]

你代码提交的邮箱和 n1n-api 这个账号的邮箱一直吗？你check 一下吧。 还有comment 的图片 default_icon/n1n.png 还没有提交。

**n1n-api **

[n1n-api]

你代码提交的邮箱和 n1n-api 这个账号的邮箱一直吗？你check 一下吧。 还有comment 的图片 default_icon/n1n.png 还没有提交。

**n1n-api **

感谢您的审核。

我已经根据反馈更新了分支：

1. 修正了提交的邮箱
2. 在 docker/volumes/minio/default_icon/ 目录下添加了 n1n.png 图标

请帮忙再看下，谢谢！

[fanlv]

可以提供一下”通过管理后台添加 N1N 模型“ 成功的测试截图吗。

[n1n-api]

可以提供一下”通过管理后台添加 N1N 模型“ 成功的测试截图吗。

您好，请查看附件～

[fanlv]

如果只是通过 openAI 协议添加的话，现有的能力就支持。你加的功能用不上。

[n1n-api]

如果只是通过 openAI 协议添加的话，现有的能力就支持。你加的功能用不上。

不是要从你们的动态管理那里添加吗？以为要看一下是否接口本身能连接通🥹