fix(workflow): stop deleted workflows from returning after a stale edit

crates/buzz-db/src/lib.rs

@@ -3518,16 +3518,25 @@ impl Db {
         workflow::delete_workflow(&self.pool, community_id, id).await
     }
 
-    /// Delete a workflow only when it belongs to the provided owner.
-    /// Returns the deleted workflow's `channel_id`.
-    #[datastore_span(name = "delete_workflow_for_owner", system = "postgresql")]
-    pub async fn delete_workflow_for_owner(
+    /// Delete a workflow and tombstone its live kind:30620 definition atomically.
+    ///
+    /// Returns the workflow-row, cache-invalidation, and event-tombstone outcome.
+    #[datastore_span(name = "delete_workflow_and_definition_for_owner", system = "postgresql")]
+    pub async fn delete_workflow_and_definition_for_owner(
         &self,
         community_id: CommunityId,
         id: Uuid,
         owner_pubkey: &[u8],
-    ) -> Result<Option<Uuid>> {
-        workflow::delete_workflow_for_owner(&self.pool, community_id, id, owner_pubkey).await
+        d_tag: &str,
+    ) -> Result<workflow::WorkflowLifecycleDeleteResult> {
+        workflow::delete_workflow_and_definition_for_owner(
+            &self.pool,
+            community_id,
+            id,
+            owner_pubkey,
+            d_tag,
+        )
+        .await
     }
 
     /// Find a workflow by owner pubkey and name within a community. Used for