chore: Update sdk_metadata features

[devin-ai-integration]

Requirements

• I have added test coverage for new or changed functionality
• I have followed the repository's pull request submission guidelines
• I have validated my changes against all supported platform versions

Related issues

N/A — metadata-only change.

Describe the solution you've provided

Add fdv2 feature entry ("introduced": "7.11") to .sdk_metadata.json. Version 7.11 is the EAP release of FDv2 data system support.

Describe alternatives you've considered

N/A

Additional context

Part of a batch update across SDK repos to register FDv2 support in sdk-meta.

Link to Devin session: https://app.devin.ai/sessions/38b4be153c46469b8fcfdd9592381463

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Note

Low Risk
Single JSON metadata entry with no application or library code changes.

Overview
Registers FDv2 (Flag Delivery v2 data system) in .sdk_metadata.json for java-server-sdk, with "introduced": "7.11" to match the EAP release.

This is a metadata-only update for sdk-meta parity with other SDK repos; it does not change runtime SDK behavior in this PR.

^{Reviewed by Cursor Bugbot for commit 86dad33. Bugbot is set up for automated code reviews on this repo. Configure here.}

[devin-ai-integration]

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