Add last_scheduled_run_at column

Panos Kanellidisrequested to merge
add_last_scheduled_run_column_to_schedules into master

What does this MR do and why?

Adds the column to track the last scheduled run and avoid duplicate creations due to deduplication issues.

Prerequisite for: !203989 (comment 2739463412)

MR acceptance checklist

Evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Merge request reports