Flow control supports outcome-specific notifications

Flow control steps can now respond differently when a step succeeds, fails, or returns no results.

• Configure separate behavior for success, failure, and empty-result outcomes.
• Send email or Slack notifications with values from previous workflow steps.
• Deliver flow-control emails to embedded end users when a workflow runs through MindCloud Embedded.
• Use handled failure details in later workflow steps.
• Limit repeated flow-control emails so notification failures are easier to reason about.