Mark project node as instigating source for instances from project

src/snapshot_middleware/project.rs

@@ -6,7 +6,7 @@ use rbx_reflection::try_resolve_value;
 use crate::{
     imfs::{FsErrorKind, Imfs, ImfsEntry, ImfsFetcher},
     project::{Project, ProjectNode},
-    snapshot::{InstanceMetadata, InstanceSnapshot},
+    snapshot::{InstanceMetadata, InstanceSnapshot, InstigatingSource},
 };
 
 use super::{
@@ -174,6 +174,11 @@ fn snapshot_project_node<F: ImfsFetcher>(
         metadata.ignore_unknown_instances = true;
     }
 
+    metadata.instigating_source = Some(InstigatingSource::ProjectNode(
+        instance_name.to_string(),
+        node.clone(),
+    ));
+
     Ok(Some(InstanceSnapshot {
         snapshot_id: None,
         name,

src/snapshot_middleware/snapshots/test__project_with_children.snap

@@ -16,6 +16,14 @@ children:
   - snapshot_id: ~
     metadata:
       ignore_unknown_instances: true
+      instigating_source:
+        ProjectNode:
+          - Child
+          - class_name: Model
+            children: {}
+            properties: {}
+            ignore_unknown_instances: ~
+            path: ~
       relevant_paths: []
     name: Child
     class_name: Model

src/snapshot_middleware/snapshots/test__project_with_path_to_project_with_children.snap

@@ -17,6 +17,14 @@ children:
   - snapshot_id: ~
     metadata:
       ignore_unknown_instances: true
+      instigating_source:
+        ProjectNode:
+          - SomeChild
+          - class_name: Model
+            children: {}
+            properties: {}
+            ignore_unknown_instances: ~
+            path: ~
       relevant_paths: []
     name: SomeChild
     class_name: Model