docs: Add TODO comment to prevent re-indexing if previously indexed documents have not been deleted.

Author: JoseSzycho

internal/controllers/policy/policy_controller.go

@@ -363,6 +363,8 @@ func (r *ResourceIndexPolicyReconciler) Reconcile(ctx context.Context, req ctrl.
 
 	// Trigger background re-indexing
 	if needsReindexing {
+		// TODO: Do not re-index resources if the previously indexed documents
+		// have not been deleted. To be done here https://github.com/datum-cloud/search/issues/32
 		logger.Info("Triggering background re-indexing", "specHash", currentHash)
 		if err := r.publishReindexMessages(ctx, policy); err != nil {
 			logger.Error(err, "Failed to publish re-index messages")