Report the (new) current target blueprint

Author: plotnick

nexus/src/app/background/tasks/blueprint_planner.rs

@@ -69,6 +69,7 @@ impl BlueprintPlanner {
             return status;
         };
         let (target, parent) = &*loaded;
+        status.blueprint_id = parent.id;
 
         // Get the inventory most recently seen by the collection
         // background task. The value is `Copy`, so with the deref
@@ -161,6 +162,7 @@ impl BlueprintPlanner {
                 "parent_blueprint_id" => %parent.id,
                 "blueprint_id" => %blueprint.id,
             );
+            status.blueprint_id = blueprint.id;
 
             // Save it.
             match self.datastore.blueprint_insert(opctx, &blueprint).await {

nexus/types/src/internal_api/background.rs

@@ -471,8 +471,11 @@ pub struct BlueprintPlannerStatus {
     pub error: Option<String>,
 
     /// `true` iff the planning run generated a blueprint that is identical
-    /// to the current target.
+    /// to the target before planning.
     pub unchanged: bool,
+
+    /// The id of the (new) current target blueprint.
+    pub blueprint_id: BlueprintUuid,
 }
 
 /// The status of a `alert_dispatcher` background task activation.