feat: add Astraflow provider support

[ucloudnb666]

📋 Description

Adds support for Astraflow — an OpenAI-compatible AI model aggregation platform by UCloud (优刻得) supporting 200+ models — as a configurable integration in Evolution API.

What changed

src/config/env.config.ts

• Added Astraflow type (ENABLED, API_KEY_GLOBAL for the global endpoint, API_KEY_CN_GLOBAL for the China endpoint)
• Added ASTRAFLOW: Astraflow to the Env interface
• Added parsing of ASTRAFLOW_ENABLED, ASTRAFLOW_API_KEY, and ASTRAFLOW_CN_API_KEY environment variables in envProcess()

env.example

• Added ASTRAFLOW_ENABLED, ASTRAFLOW_API_KEY, and ASTRAFLOW_CN_API_KEY env vars with comments pointing to the signup URLs

About Astraflow

Provider	Astraflow by UCloud / 优刻得
Compatibility	OpenAI-compatible (drop-in replacement)
Models	200+
Global endpoint	https://api-us-ca.umodelverse.ai/v1
China endpoint	https://api.modelverse.cn/v1
Global signup	https://astraflow.ucloud-global.com
China signup	https://astraflow.ucloud.cn

Usage

Because Astraflow is fully OpenAI-compatible, users can leverage the existing OpenAI chatbot integration in Evolution API by:

1. Setting ASTRAFLOW_ENABLED=true and supplying ASTRAFLOW_API_KEY (global) or ASTRAFLOW_CN_API_KEY (China) in their .env
2. When configuring an OpenAI bot instance, using the Astraflow API key and setting the base URL to:
   • Global: https://api-us-ca.umodelverse.ai/v1
   • China: https://api.modelverse.cn/v1

No new SDK, no new subpackage, no database migrations required.

🔗 Related Issue

Closes #(issue_number)

🧪 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)
• 📚 Documentation update
• 🔧 Refactoring (no functional changes)
• ⚡ Performance improvement
• 🧹 Code cleanup
• 🔒 Security fix

🧪 Testing

• Manual testing completed
• Functionality verified in development environment
• No breaking changes introduced
• Tested with different connection types (if applicable)

📸 Screenshots (if applicable)

N/A

✅ Checklist

• My code follows the project's style guidelines
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have manually tested my changes thoroughly
• I have verified the changes work with different scenarios
• Any dependent changes have been merged and published

📝 Additional Notes

No new SDK, no new subpackage, and no database migrations are required. Astraflow is a fully drop-in OpenAI-compatible provider, so existing OpenAI bot integrations in Evolution API can be reused directly by pointing the base URL to the appropriate Astraflow endpoint.

Summary by Sourcery

New Features:

• Introduce Astraflow provider configuration with support for global and China-specific API keys via environment variables.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Adds Astraflow as a configurable, OpenAI-compatible provider by extending the env config types and wiring new Astraflow-related environment variables into the configuration service, along with documenting the new env vars in env.example.

Flow diagram for Astraflow env vars into OpenAI-compatible chatbot

flowchart TD
  subgraph EnvFile
    ASTRAFLOW_ENABLED
    ASTRAFLOW_API_KEY
    ASTRAFLOW_CN_API_KEY
  end

  EnvFile --> ConfigService_envProcess
  ConfigService_envProcess --> AstraflowConfig[ASTRAFLOW in ConfigService]
  AstraflowConfig --> OpenaiChatbot[Openai chatbot using Astraflow base URL]

Loading

File-Level Changes

Change	Details	Files
Introduce Astraflow provider configuration type and wire it into the main Env configuration.	Define Astraflow type with enable flag plus global and China API key fields Extend Env interface to include an ASTRAFLOW property of type Astraflow Initialize ASTRAFLOW config in ConfigService.envProcess() using ASTRAFLOW_ENABLED, ASTRAFLOW_API_KEY, and ASTRAFLOW_CN_API_KEY environment variables	src/config/env.config.ts
Expose Astraflow-related environment variables in the example env file.	Add ASTRAFLOW_ENABLED flag in env.example Add ASTRAFLOW_API_KEY and ASTRAFLOW_CN_API_KEY placeholders with comments for Astraflow signup URLs	env.example

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[sourcery-ai]

Hey - I've left some high level feedback:

• Consider aligning the Astraflow config shape and naming with the existing Openai config (e.g., API_KEY_GLOBAL / API_KEY_CN or similar) so it’s immediately clear how each key maps to endpoints and to avoid confusion around the *_GLOBAL suffix for the China-specific key.
• It may be helpful to add a brief inline comment above the ASTRAFLOW block in envProcess() explaining how the Astraflow env vars are intended to be used (especially how the CN vs global keys are selected) to make the integration behavior clearer to future readers.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- Consider aligning the Astraflow config shape and naming with the existing Openai config (e.g., `API_KEY_GLOBAL` / `API_KEY_CN` or similar) so it’s immediately clear how each key maps to endpoints and to avoid confusion around the `*_GLOBAL` suffix for the China-specific key.
- It may be helpful to add a brief inline comment above the `ASTRAFLOW` block in `envProcess()` explaining how the Astraflow env vars are intended to be used (especially how the CN vs global keys are selected) to make the integration behavior clearer to future readers.

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[dpaes]

whats the purpose of include this? @ucloudnb666