refactor: remove audio - mark deprecated

#1944

Author: jo-elimu

src/main/java/ai/elimu/model/content/Sound.java

@@ -49,7 +49,7 @@ public class Sound extends Content {
   @Column(length = 5)
   private String valueSampa;
 
-  //    @NotNull
+  @Deprecated
   @OneToOne
   private Audio audio;
 

src/main/java/ai/elimu/model/content/multimedia/Audio.java

@@ -13,6 +13,7 @@
 import lombok.Getter;
 import lombok.Setter;
 
+@Deprecated
 @Getter
 @Setter
 @Entity

src/main/java/ai/elimu/model/contributor/AudioContributionEvent.java

@@ -7,6 +7,7 @@
 import lombok.Getter;
 import lombok.Setter;
 
+@Deprecated
 @Getter
 @Setter
 @Entity

src/main/java/ai/elimu/model/contributor/AudioPeerReviewEvent.java

@@ -9,6 +9,7 @@
 /**
  * An event where a {@link Contributor} peer-reviews a {@link Audio} which was added/edited by another {@link Contributor}.
  */
+@Deprecated
 @Getter
 @Setter
 @Entity