chore: Change name to owned namespace

[keelerm84]

Note

Low Risk
Low risk metadata-only change; it updates the npm package name (including the lockfile) without touching runtime code or dependencies.

Overview
Renames the npm package from launchdarkly-apex-server-sdk to the scoped @launchdarkly/apex-server-sdk in both package.json and package-lock.json so the project publishes/identifies under the owned namespace.

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