feat: Add owner field to Entity and rename labels to tags

* Add owner field to Entity and rename labels to tags

Signed-off-by: Felix Wang <wangfelix98@gmail.com>

* Change all entities in tests to reference tags instead of labels

Signed-off-by: Felix Wang <wangfelix98@gmail.com>

* Add deprecation warning for labels argument

Signed-off-by: Felix Wang <wangfelix98@gmail.com>

Author: felixwang9817

java/serving/src/test/java/feast/serving/util/DataGenerator.java

@@ -116,12 +116,12 @@ public static EntityProto.EntitySpecV2 createEntitySpecV2(
       String name,
       String description,
       ValueProto.ValueType.Enum valueType,
-      Map<String, String> labels) {
+      Map<String, String> tags) {
     return EntityProto.EntitySpecV2.newBuilder()
         .setName(name)
         .setDescription(description)
         .setValueType(valueType)
-        .putAllLabels(labels)
+        .putAllTags(tags)
         .build();
   }
 

protos/feast/core/Entity.proto

@@ -48,7 +48,10 @@ message EntitySpecV2 {
     string join_key = 4;
 
     // User defined metadata
-    map<string,string> labels = 8;
+    map<string,string> tags = 8;
+
+    // Owner of the entity.
+    string owner = 10;
 }
 
 message EntityMeta {