chore: bump SDK version to 25.2.0

[TorstenDittmann]

This PR bumps SDK version metadata to 25.2.0 after the concurrent chunk upload update.

[greptile-apps]

Greptile Summary

Bumps the Node.js SDK version from 25.1.0 to 25.2.0 across all relevant files to reflect the concurrent chunk upload update shipped in this release cycle.

• package.json and package-lock.json updated to 25.2.0.
• src/client.ts updated in both the getUserAgent() function and the default x-sdk-version header to keep server-side identification consistent with the published version.

Confidence Score: 5/5

Safe to merge — all version strings are updated consistently across every affected location.

The change is a mechanical version bump touching four string literals across three files. All occurrences are updated consistently: both the npm manifest files and both version strings in the client (user-agent and the request header). No logic, dependencies, or behavior was modified.

No files require special attention.

Important Files Changed

Filename	Overview
package.json	Version bumped from 25.1.0 to 25.2.0
package-lock.json	Lock file version updated in both root and packages entries to match package.json
src/client.ts	User-agent string and x-sdk-version header both updated to 25.2.0

_{Reviews (1): Last reviewed commit: "chore: bump SDK version to 25.2.0" | Re-trigger Greptile}