feat: filter is used to filter conversations used for issue model tra…

…ining

feat: update_time is used to indicate when the phrase matcher was updated

PiperOrigin-RevId: 397164390

google/cloud/contactcenterinsights/v1/resources.proto

@@ -567,11 +567,17 @@ message IssueModel {
 
   // Configs for the input data used to create the issue model.
   message InputDataConfig {
-    // Required. Medium of conversations used in training data.
-    Conversation.Medium medium = 1 [(google.api.field_behavior) = REQUIRED];
+    // Medium of conversations used in training data. This field is being
+    // deprecated. To specify the medium to be used in training a new issue
+    // model, set the `medium` field on `filter`.
+    Conversation.Medium medium = 1 [deprecated = true];
 
     // Output only. Number of conversations used in training. Output only.
     int64 training_conversations_count = 2 [(google.api.field_behavior) = OUTPUT_ONLY];
+
+    // A filter to reduce the conversations used for training the model to a
+    // specific subset.
+    string filter = 3;
   }
 
   // State of the model.
@@ -730,6 +736,9 @@ message PhraseMatcher {
   // against. If the role is ROLE_UNSPECIFIED it will be matched against any
   // utterances in the transcript.
   ConversationParticipant.Role role_match = 10;
+
+  // Output only. The most recent time at which the phrase matcher was updated.
+  google.protobuf.Timestamp update_time = 11 [(google.api.field_behavior) = OUTPUT_ONLY];
 }
 
 // A message representing a rule in the phrase matcher.