Newly created workflows cannot be deleted

## **Describe the bug**
Workflows successfully create and execute on the backend relay, but they cannot be deleted. Attempting to delete a workflow confirms the action visually or programmatically, but the workflow remains active, continues to trigger, and still populates the dashboard list upon UI refresh.

## **Steps to reproduce**
1. Go to the **Workflows** panel.
2. Click on **Create New Workflow** and configure a basic trigger.
3. Observe that the workflow successfully triggers and runs on the backend.
4. Click on the **Delete** button next to the newly created workflow (or run `buzz workflows delete ` via CLI).
5. Refresh the page or restart the client and see that the workflow has resurrected and is still running.

## **Expected behavior**
The workflow should be permanently deleted from the database and relay, immediately halting all future trigger executions and removing the entry from the UI list.

## **Version and platform**
- **Buzz version:** [e.g., 0.1.0-alpha - check your Settings sidebar]
- **OS:** [e.g., Windows 11, macOS Sequoia, Ubuntu 24.04]

## **Logs / additional context**
The terminal/relay logs show an accepted deletion status event, but the tracking database fails to clear the event record, causing the workflow definition to persist.

**Temporary workaround used:** Manually setting `enabled: false` via configuration updates to force the backend engine to ignore the triggers.