HARM_CATEGORY_JAILBREAK not supported in Gemini API

## Description
The `HarmCategory.Known.HARM_CATEGORY_JAILBREAK` enum value exists in the Java SDK (v1.32.0) but is explicitly marked as unsupported in the Javadoc:

> "The harm category is for jailbreak prompts. This enum value is not supported in Gemini API."

## Code Example
```java
List safetySettings = List.of(
SafetySetting.builder()
.category(HarmCategory.Known.HARM_CATEGORY_JAILBREAK) // Exists but not supported
.threshold(HarmBlockThreshold.Known.BLOCK_MEDIUM_AND_ABOVE)
.build()
);
```

## Questions
1. **Is this feature planned for future releases?** If yes, what is the expected timeline?
2. **Is there currently an alternative approach to prevent jailbreak attempts?**

## Environment
- SDK Version: `google-genai` 1.32.0 (Maven)
- Language: Java

## Expected Behavior
- A roadmap/timeline should be provided for when this feature will be supported

## Additional Context
This would help developers make informed decisions about security settings implementation.