fix(logs): added indexes to speed up logs loading time, modified to only display logs for current workspace

[waleedlatif1]

Description

added indexes to speed up logs loading time, modified to only display logs for current workspace, decr logs lookup time from O(n) to O(log(n))

Type of change

• Bug fix (non-breaking change which fixes an issue)
• Performance improvement

How Has This Been Tested?

Tested manually across workspaces, ensured that we only see the logs for that workspace

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added tests that prove my fix is effective or that my feature works
• All tests pass locally and in CI (bun run test)
• My changes generate no new warnings
• Any dependent changes have been merged and published in downstream modules
• I have updated version numbers as needed (if needed)
• I confirm that I have read and agree to the terms outlined in the Contributor License Agreement (CLA)

Security Considerations:

• My changes do not introduce any new security vulnerabilities
• I have considered the security implications of my changes

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[greptile-apps]

Greptile Summary

This PR implements database performance optimizations for logs by adding strategic indexes to the workflow and workflow_logs tables. The changes include five new B-tree indexes:

• workflow_user_id_idx on the workflow table's user_id column
• workflow_workspace_id_idx on the workflow table's workspace_id column
• workflow_user_workspace_idx as a composite index on user_id and workspace_id
• workflow_logs_workflow_id_idx on the workflow_logs table's workflow_id column
• workflow_logs_workflow_created_idx as a composite index on workflow_id and created_at

These indexes are designed to optimize the common query patterns used when filtering logs by workspace membership. The PR addresses a performance bottleneck where log queries were previously performing full table scans (O(n) complexity) by enabling efficient indexed lookups (O(log(n)) complexity). The workspace-scoped filtering ensures users only see logs for workflows within their current workspace, which requires joining workflow_logs → workflow → workspace_member tables - operations that these indexes make highly efficient.

The changes integrate seamlessly with the existing database schema architecture, following established patterns for multi-tenant workspace isolation. The migration includes proper snapshot versioning and journal entries to maintain database schema consistency across deployments.

Confidence score: 5/5

• This PR is extremely safe to merge - it only adds performance-optimizing indexes without modifying any data or application logic
• The indexes follow standard PostgreSQL best practices and target well-defined query patterns that clearly benefit from indexing
• No files need additional attention - the migration is straightforward and all changes are properly coordinated

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