Implement targeted VM property refresh and backfill logic for snapshot rows

internal/vcenter/vcenter.go

@@ -296,6 +296,24 @@ func (v *Vcenter) GetAllVMsWithProps() ([]mo.VirtualMachine, error) {
 	return vms, nil
 }
 
+// GetVMWithSnapshotPropsByRef retrieves snapshot-critical properties for a single VM reference.
+// Used as a targeted fallback when bulk retrieval returns partial data for a VM.
+func (v *Vcenter) GetVMWithSnapshotPropsByRef(ref types.ManagedObjectReference) (*mo.VirtualMachine, error) {
+	var vm mo.VirtualMachine
+	props := []string{
+		"name",
+		"parent",
+		"config",
+		"runtime.powerState",
+		"runtime.host",
+		"resourcePool",
+	}
+	if err := v.client.RetrieveOne(v.ctx, ref, props, &vm); err != nil {
+		return nil, err
+	}
+	return &vm, nil
+}
+
 // FindVmDeletionEvents returns a map of MoRef (VmId) to the deletion event time within the given window.
 func (v *Vcenter) FindVmDeletionEvents(ctx context.Context, begin, end time.Time) (map[string]time.Time, error) {
 	return v.findVmDeletionEvents(ctx, begin, end, nil)