Fix missing license

.github/workflows/health.yaml

@@ -7,13 +7,5 @@ on:
 jobs:
   health:
     uses: dart-lang/ecosystem/.github/workflows/health.yaml@main
-    with:
-      coverage_web: true
-      checkout_submodules: true
-      experiments: native-assets
-      sdk: dev
-      ignore_license: "**.g.dart,pkgs/intl_translation/example/lib/generated/**,pkgs/intl_translation/test/generate_localized/**,pkgs/intl_translation/test/two_components/**"
-      ignore_coverage: "**.g.dart"
-      ignore_packages: "submodules"
     permissions:
       pull-requests: write

.github/workflows/post_summaries.yaml

@@ -6,6 +6,7 @@ on:
   workflow_run:
     workflows: 
       - Publish
+      - Health
     types:
       - completed
 

pkgs/unified_analytics/CHANGELOG.md

@@ -1,6 +1,7 @@
 ## 6.1.3-wip
 
 - Require Dart 3.4.
+- Add license header.
 
 ## 6.1.2
 

pkgs/unified_analytics/lib/testing.dart

@@ -1 +1,5 @@
+// Copyright (c) 2024, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 export 'src/enums.dart';