• Execute the backfill REST API endpoint filtered by non-payg product ID.
• Ensure processing is limited to the specified product scope.
• Run relevant Gabi queries on the updated data set.
• Perform EXPLAIN ANALYZE to validate query plans and index usage.
• Capture execution results and observations.

Acceptance Criteria

• REST endpoint runs successfully for the specified non-payg product ID only.
• No unintended data changes outside the target product.
• EXPLAIN ANALYZE is executed on relevant Gabi queries.
• Expected indexes are used with no performance regression.
• Results and findings are documented and reviewed.