`_fix_tool_message_ordering` only runs with reasoning enabled, breaks Anthropic without it

The following error is triggered when using Anthropic models without reasoning enabled.

```
AnthropicException - messages.2.content.1: unexpected `tool_use_id` found in `tool_result` blocks
```

**Root cause:**
The `_fix_tool_message_ordering()` method is only called when `preserve_thinking_blocks=True` (i.e., when reasoning is enabled), but the bug it fixes affects **all** Anthropic models.
