### What problem does this PR solve?

Add api for sessions and add max_tokens for tenant_llm

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

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Co-authored-by: liuhua <10215101452@stu.ecun.edu.cn>

### What problem does this PR solve?

feat: Delete Model Provider #2376

### Type of change

- [ ] Bug Fix (non-breaking change which fixes an issue)
- [x] New Feature (non-breaking change which adds functionality)

### What problem does this PR solve?

#1771  add supprot for OpenAI-API-Compatible 

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

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Co-authored-by: Zhedong Cen <cenzhedong2@126.com>

### What problem does this PR solve?

feat: delete the added model #503
feat: display an error message when the requested file fails to parse
#684

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

### What problem does this PR solve?

add support for ollama

Issue link:#221

### Type of change

- [x] New Feature (non-breaking change which adds functionality)