pydantic-ai: Set request parameters #8015

#### Configuration Attributes

| Attribute | Required |
|---|---|
| `gen_ai.request.max_tokens` | Required if provided |
| `gen_ai.request.seed` | Required if provided |
| `gen_ai.request.frequency_penalty` | Required if provided |
| `gen_ai.request.presence_penalty` | Required if provided |
| `gen_ai.request.temperature` | Required if provided |
| `gen_ai.request.top_p` | Required if provided |
| `gen_ai.request.top_k` | Required if provided |