ClusterState contains Enrich Policy metadata information, that can be useful to other plugins.
As of now, ClusterState metadata contains [EnrichMetadata](https://github.com/elastic/elasticsearch/blob/main/x-pack/plugin/enrich/src/main/java/org/elasticsearch/xpack/enrich/EnrichMetadata.java) objects, that contain [EnrichPolicy](https://github.com/elastic/elasticsearch/blob/main/x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/enrich/EnrichPolicy.java) objects.
While `EnrichPolicy` class is in `core`, `EnrichMetadata` is in `enrich` plugin, so it's practically impossible to access EnrichPolicy information without creating a dependency from `enrich` plugin.
It would be good to have an interface in core to avoid this dependency.
x-pack/plugin/enrich/src/main/java/org/elasticsearch/xpack/enrich/EnrichPlugin.java
new RestExecuteEnrichPolicyAction(),
            new RestEnrichStatsAction()
        );
    }
    @Override
    public Collection<Object> createComponents(
        Client client,
        ClusterService clusterService,
        ThreadPool threadPool,
        ResourceWatcherService resourceWatcherService,
        ScriptService scriptService,
        NamedXContentRegistry xContentRegistry,
        Environment environment,
        NodeEnvironment nodeEnvironment,
        NamedWriteableRegistry namedWriteableRegistry,
        IndexNameExpressionResolver expressionResolver,
        Supplier<RepositoriesService> repositoriesServiceSupplier,
        Tracer tracer,
        AllocationService allocationService
    ) {
        EnrichPolicyLocks enrichPolicyLocks = new EnrichPolicyLocks();
        EnrichPolicyExecutor enrichPolicyExecutor = new EnrichPolicyExecutor(
            settings,
            clusterService,
            client,
            threadPool,
            expressionResolver,
            enrichPolicyLocks,
            System::currentTimeMillis
        );