Add metadata to BFF Feature proto

proto/lekko/bff/v1beta1/bff.proto

@@ -432,6 +432,10 @@ message ContextKey {
   ContextKeyType type = 2;
 }
 
+// The configs will have metadata fields populated based on the latest rolled
+// out version of the repo.
+// If a config was newly created since, created_at will not be set.
+// If a config existed already but was updated, last_updated_at will not be set.
 message GetRepositoryContentsResponse {
   Branch branch = 1;
   NamespaceContents namespace_contents = 2;
@@ -468,6 +472,11 @@ message GetFeatureHistoryResponse {
   repeated FeatureHistoryItem history = 1;
 }
 
+message ConfigMetadata {
+  google.protobuf.Timestamp created_at = 1;
+  google.protobuf.Timestamp last_updated_at = 2;
+}
+
 message Feature {
   string name = 1;
   string namespace_name = 2;
@@ -479,6 +488,7 @@ message Feature {
   // the blob sha of the proto bin file according to git
   string sha = 6;
   lekko.feature.v1beta1.StaticFeature static_feature_new = 7;
+  ConfigMetadata metadata = 8;
 }
 
 message FeatureHistoryItem {