workflows rollback migration

backend/supabase/migrations/20250705155923_rollback_workflows.sql

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+-- Rollback script for old workflow migrations
+DROP TABLE IF EXISTS workflow_flows CASCADE;
+
+-- Drop workflow execution logs (depends on workflow_executions)
+DROP TABLE IF EXISTS workflow_execution_logs CASCADE;
+
+-- Drop workflow variables (depends on workflows)
+DROP TABLE IF EXISTS workflow_variables CASCADE;
+
+-- Drop webhook registrations (depends on workflows)
+DROP TABLE IF EXISTS webhook_registrations CASCADE;
+
+-- Drop scheduled jobs (depends on workflows)
+DROP TABLE IF EXISTS scheduled_jobs CASCADE;
+
+-- Drop triggers (depends on workflows)
+DROP TABLE IF EXISTS triggers CASCADE;
+
+-- Drop workflow executions (depends on workflows)
+DROP TABLE IF EXISTS workflow_executions CASCADE;
+
+-- Drop workflow templates (standalone table)
+DROP TABLE IF EXISTS workflow_templates CASCADE;
+
+-- Drop workflows table (main table)
+DROP TABLE IF EXISTS workflows CASCADE;
+
+-- Drop workflow-specific functions
+DROP FUNCTION IF EXISTS cleanup_old_execution_logs(INTEGER);
+DROP FUNCTION IF EXISTS get_workflow_statistics(UUID);
+
+-- Drop enum types (in reverse order of dependencies)
+DROP TYPE IF EXISTS connection_type CASCADE;
+DROP TYPE IF EXISTS node_type CASCADE;
+DROP TYPE IF EXISTS trigger_type CASCADE;
+DROP TYPE IF EXISTS execution_status CASCADE;
+DROP TYPE IF EXISTS workflow_status CASCADE;