chore: Update sdk_metadata features

[devin-ai-integration]

Requirements

• I have added test coverage for new or changed functionality — N/A, metadata-only change
• I have followed the repository's pull request submission guidelines
• I have validated my changes against all supported platform versions — N/A, metadata-only change

Related issues

Part of a cross-repo effort to populate the features field in .sdk_metadata.json for all LaunchDarkly SDKs.

Describe the solution you've provided

Adds a features map to the Vue SDK entry in .sdk_metadata.json, documenting which SDK features are supported and the version each was introduced. Feature keys use the canonical camelCase names from sdk-meta/products/feature_info.json, and introduction versions are sourced from the SDK features documentation table (JavaScript-based client-side SDKs → Vue column) and verified against the repository's CHANGELOG.

16 features included (alphabetical): allFlags, appMetadata, bigSegments, bootstrapping, contexts, experimentation, flagChanges, hooks, inlineContextCustomEvents, perContextSummaryEvents, pluginSupport, privateAttrs, relayProxyProxy, secureMode, track, variationDetail.

Updates since last revision

1. Added two features, verified against CHANGELOG.md entry under ## [2.4.0]:

   • hooks: introduced in 2.4 — confirmed via "Add hooks support"
   • perContextSummaryEvents: introduced in 2.4 — confirmed via "Add per-context summary events"

   Note: all four features at version 2.4 (hooks, inlineContextCustomEvents, perContextSummaryEvents, pluginSupport) were introduced in the same release via a single js-client-sdk bump.

2. Added six features at version 1.0 per reviewer guidance — these were inherited from the underlying js-client-sdk, which already supported them when the Vue SDK was first created:

   • allFlags
   • appMetadata
   • bootstrapping
   • flagChanges
   • relayProxyProxy
   • secureMode

Human review checklist

• Verify the six 1.0 inherited features (allFlags, appMetadata, bootstrapping, flagChanges, relayProxyProxy, secureMode) — these were added per reviewer guidance as features inherited from js-client-sdk. Confirm all six were indeed supported by js-client-sdk at the time Vue SDK 1.0 (July 2022) was released. In particular, appMetadata at 1.0 is worth double-checking, since other SDKs typically added it later.
• Verify pluginSupport: "2.4" — mapped from the "Observability plugin" row in the docs table. Confirm this is the correct feature key for the Vue SDK.
• Verify hooks: "2.4" and perContextSummaryEvents: "2.4" — both confirmed in CHANGELOG ## [2.4.0]. Confirm these are the correct canonical feature keys.
• Spot-check introduction versions against the repo's CHANGELOG (e.g., contexts: "2.0", inlineContextCustomEvents: "2.4").
• Confirm no features are still missing — verify against the docs table and js-client-sdk capabilities.

Describe alternatives you've considered

N/A — follows the established pattern from other SDKs (e.g., js-core, go-server-sdk).

Additional context

• Link to Devin session
• Requested by: Aaron Zeisler

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Note

Low Risk
Low risk metadata-only change that updates .sdk_metadata.json with a feature support matrix; no runtime code paths are affected.

Overview
Adds a features map to the Vue entry in .sdk_metadata.json, documenting which SDK capabilities are supported and the version each was introduced (including several new entries introduced in 2.4 and baseline support in 1.0).

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[devin-ai-integration]

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[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no bugs or issues to report.

[aaron-zeisler]

Devin: allFlags, appMetadata, bootstrapping, flagChanges, relayProxyProxy, and secureMode were all introduced in version 1.0 of the Vue SDK, because the Vue SDK is a wrapper around the underlying js-client-sdk (which supported all those features when the Vue SDK was created).

[devin-ai-integration]

Done — added all 6 features at version 1.0 (inherited from the underlying js-client-sdk): allFlags, appMetadata, bootstrapping, flagChanges, relayProxyProxy, secureMode. Vue SDK now has 16 features total.