fix: marked old plugin health status and store stats supplier as depr…

…ecated

Signed-off-by: Johannes Peter <[email protected]>

src/main/java/com/o19s/es/ltr/stats/suppliers/PluginHealthStatusSupplier.java

@@ -28,7 +28,10 @@
 
 /**
  * Supplier for an overall plugin health status.
+ * @deprecated This class is outdated since 3.0.0-3.0.0 and will be removed in the future.
+ * Please use the new stats framework in the {@link org.opensearch.ltr.stats} package.
  */
+@Deprecated(since = "3.0.0-3.0.0", forRemoval = true)
 public class PluginHealthStatusSupplier implements Supplier<String> {
     private static final String STATUS_GREEN = "green";
     private static final String STATUS_YELLOW = "yellow";

src/main/java/com/o19s/es/ltr/stats/suppliers/StoreStatsSupplier.java

@@ -48,7 +48,10 @@
  * A supplier which provides information on all feature stores. It provides basic
  * information such as the index health and count of feature sets, features and
  * models in the store.
+ * @deprecated This class is outdated since 3.0.0-3.0.0 and will be removed in the future.
+ * Please use the new stats framework in the {@link org.opensearch.ltr.stats} package.
  */
+@Deprecated(since = "3.0.0-3.0.0", forRemoval = true)
 public class StoreStatsSupplier implements Supplier<Map<String, Map<String, Object>>> {
     private static final Logger LOG = LogManager.getLogger(StoreStatsSupplier.class);
     private static final String AGG_FIELD = "type";