feat: support `strict` mode for DeepSeek

- [x] I have looked for existing issues (including closed) about this

## Feature Request
[https://api-docs.deepseek.com/guides/function_calling#strict-mode-beta](Docs)

Strict function calling for DeepSeek.

### Motivation

Support more things -> get more users -> ??? -> profit

### Proposal

Use `From`

The issue mentions using `From` to implement strict mode for DeepSeek function calling. Look at the DeepSeek API documentation link provided to understand the strict mode feature. Examine the existing tool definition and completion modules in the codebase to see how function calling is currently implemented. The goal is to add a 'strict' mode option, likely as a parameter or configuration. Check if there are existing tests for function calling to understand the expected behavior.

Scritto dal modello di indicizzazione a partire dal testo della issue.