[Bug]:Anthropic SDK throws AnthropicInvalidDataException when using proxy services that strip the `id` field

## Describe the bug

When using `AnthropicChatModel` with a proxy service (`anthropic proxy api`) that forwards Anthropic API responses, the SDK throws `AnthropicInvalidDataException: id is not set`.

This issue occurs because some proxy services strip the `id` field from the response body for privacy reasons.

## To Reproduce

### Steps

1. Configure `AnthropicChatModel` with a proxy URL:
```java
AnthropicChatModel model = AnthropicChatModel.builder()
.apiKey("sk-ant-...") // Your API key
.modelName("claude-sonnet-4-5-20250929")
.baseUrl("Anthropic Proxy URL") // Proxy URL
.stream(false)
.build();

ReActAgent agent = ReActAgent.builder()
.name("TestAgent")
.sysPrompt("You are a math assistant.")
.model(model)
.build();

Msg response = agent.call(Msg.builder()
.textContent("2+3等于多少？")
.build()).block();
```

2. Execute the code

3. See error: `AnthropicInvalidDataException: id is not set`

### Curl Command (Alternative Reproduction)

```bash
curl -X POST "https://anthropicProxyApi/v1/messages" \
-H "Content-Type: application/json" \
-H "x-api-key: sk-ant-YOUR_API_KEY" \
-H "anthropic-version: 2023-06-01" \
-H "anthropic-dangerous-direct-browser-access: true" \
-d '{
"model": "claude-sonnet-4-5-20250929",
"max_tokens": 1024,
"messages": [
{
"role": "user",
"content": "2+3等于多少？"
}
]
}'
```

## Expected behavior

The SDK should handle responses that are missing the `id` field gracefully. The `id` field is important for tracking but not critical for response parsing.

## Error messages

```
com.anthropic.errors.AnthropicInvalidDataException: `id` is not set
at com.anthropic.core.JsonField.getRequired$anthropic_java_core(Values.kt:174)
at com.anthropic.models.messages.Message.id(Message.kt:68)
at io.agentscope.core.formatter.anthropic.AnthropicResponseParser.parseMessage(AnthropicResponseParser.java:97)
at io.agentscope.core.formatter.anthropic.AnthropicChatFormatter.parseResponse(AnthropicChatFormatter.java:47)
at io.agentscope.core.model.AnthropicChatModel.lambda$doStream$1(AnthropicChatModel.java:194)
```

### Response from Proxy (missing `id` field)

```json
{
"type": "message",
"role": "assistant",
"content": [
{
"type": "text",
"text": "2 + 3 = 5"
}
],
"model": "claude-sonnet-4-5-20250929",
"stop_reason": "end_turn",
"stop_sequence": null,
"usage": {
"input_tokens": 57,
"output_tokens": 8
}
}
```

## Environment

- **AgentScope-Java Version**: 1.0.7
- **Java Version**: 17+
- **OS**: macOS

## Additional context

### Root Cause

The Anthropic SDK 2.11.0 requires the `id` field in the message response and validates it with `@Required` annotation during deserialization.

### Affected Components

- `AnthropicChatModel` (io.agentscope.core.model.AnthropicChatModel)
- `AnthropicResponseParser` (io.agentscope.core.formatter.anthropic.AnthropicResponseParser)

### Behavior Comparison

| Scenario | Current Behavior | Expected Behavior |
|----------|-----------------|-------------------|
| Proxy without `id` field | ❌ Throws exception | ✅ Should handle gracefully |
| Official Anthropic API | ❓ Not tested yet | ✅ Should work |

### Suggested Fixes

1. **Fix in Anthropic SDK (Recommended)**: Make the `id` field optional in the SDK's `Message` class instead of required.

2. **Fix in AgentScope Response Parser**: Modify `AnthropicResponseParser.parseMessage()` to use a custom ObjectMapper that can deserialize responses without the `id` field.

3. **Proxy-Friendly Configuration**: Add a configuration option to `AnthropicChatModel.Builder` to generate fallback IDs for responses missing the `id` field.

### Note

This issue is specific to proxy services that modify Anthropic API responses. The official Anthropic API always includes the `id` field.