unrecognizedProperty cache_control

### OpenCodeReview Version

v1.8.5 (582953937) linux/amd64

### Operating System

Linux (x86_64)

### Installation Method

npm (global)

### LLM Provider

Anthropic (Claude)

### Bug Description

```
[ocr] Subtask error for pom.xml: LLM completion error: POST "": 400 Bad Request {"errorCode":"INVALID_ARGUMENT","errorName":"LanguageModelService:InvalidRequest","errorInstanceId":"b5d73937-d0f4-4dbc-b5ce-1eb5bb3bd40c","parameters":{"unsafeParams":"{unrecognizedProperty=cache_control}","message":"Request contained an unrecognized field"}}
```
Is it possible to remove this cache_control via configuration?

BTW: `ocr llm test` was successful
```
Source: OCR environment
URL:
Model:
I am Open-Code-Review, a command-line code review assistant developed by Alibaba, designed to help analyze and review code directly in your terminal environment.
✓ Connection test successful
```

### Steps to Reproduce

-

### Expected Behavior

-

### Logs / Error Output

```shell

```

### Additional Context

_No response_

Start by tracing the LLM completion request handling for the Anthropic provider and the configuration used by `ocr llm test`; no source files or tests are named in the report. Reproduce the failing review request for `pom.xml`, then determine whether `cache_control` is added to the request and verify that the resulting request is accepted without breaking the successful connection test.

Written by the indexing model from the issue text.