Sync query link creation with reduct-js#167 (record identity API)

[mother-6000]

Context

reduct-js PR #167 fixed query link creation for the new record identity API:
reductstore/reduct-js#167

Related server issue: reductstore/reductstore#1332

What changed in JS

• Query link payload now includes record_entry and record_timestamp.
• Legacy index is still sent for backward compatibility.
• recordIndex is resolved to exact record identity (entry + timestamp) via metadata query before creating a query link.
• Validation ensures recordIndex is a non-negative integer.

Task

Bring this behavior to this SDK so query link creation works correctly with the new record identity requirements while keeping backward compatibility.

Acceptance criteria

• Query link payload supports record_entry + record_timestamp.
• Legacy index compatibility is preserved where appropriate.
• recordIndex (or SDK equivalent) resolves to record identity before link creation.
• Input validation for record index is added/updated.
• Tests cover query link creation for the new behavior.
• Changelog/release notes updated.