update migration file for notekeeping purpose

[icecrasher321]

Summary

Migration has been run. Updating migration file for note-keeping purposes. Also let's us make sure drizzle migration hashes were updated and this migration is skipped.

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Project	Deployment	Preview	Comments	Updated (UTC)
sim (staging)	Building			Aug 18, 2025 8:58am

1 Skipped Deployment

Project	Deployment	Preview	Comments	Updated (UTC)
docs	Skipped			Aug 18, 2025 8:58am

[greptile-apps]

Greptile Summary

This PR updates an existing database migration file (0076_damp_vector.sql) for notekeeping purposes after the migration has already been executed in production. The changes primarily focus on performance optimizations and reliability improvements to handle large datasets more efficiently.

The migration performs a complex data restructuring operation on the workflow_execution_logs table, consolidating legacy cost and token tracking columns into new JSONB columns (execution_data and cost). The key improvements include:

• Performance Enhancement: Replaced a potentially slow recursive CTE approach with a temporary table and cursor-based pagination system using composite ordering (created_at, id) instead of simple ORDER BY id
• Timeout Management: Added a 180-second statement timeout configuration to handle long-running operations
• Batch Processing: Improved batching logic with better termination conditions that continue until no rows are selected rather than checking rows updated
• Production Readiness: Added documentation noting the migration might require manual execution in environments with strict timeouts

The migration maintains backward compatibility and is designed to be safe for reruns, handling different schema states gracefully. This type of post-execution update is common in database migration workflows to ensure the migration definition matches what was actually deployed and to capture lessons learned during production deployment.

Confidence score: 4/5

• This PR is safe to merge as it updates an already-executed migration for documentation purposes
• Score reflects that while the changes are complex, they represent improvements to an existing migration rather than new functionality
• Pay attention to the migration logic changes to ensure they accurately reflect what was deployed in production

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