prehog: add user_task_state event proto (#47380)

api/proto/teleport/usageevents/v1/usageevents.proto

@@ -723,6 +723,38 @@ message DiscoveryFetchEvent {
   string resource_type = 2;
 }
 
+// UserTaskStateEvent is emitted when a UserTask state changes.
+// This can happen when the Task is created, when it's manually
+// resolved by the user or when it changes back to being open
+// when the issue happens again.
+//
+// PostHog event: tp.usertask.state
+message UserTaskStateEvent {
+  // task_type is the identifier for the type of task.
+  // Eg, discover-ec2
+  //
+  // PostHog property: tp.usertask.task_type
+  string task_type = 1;
+
+  // issue_type is the identifier for the type of issue that occurred.
+  //
+  // PostHog property: tp.usertask.issue_type
+  string issue_type = 2;
+
+  // state identifies the new state for this task.
+  // One of: OPEN, RESOLVED
+  //
+  // PostHog property: tp.usertask.state
+  string state = 3;
+
+  // instances_count contains the number of instances that were affected by the issue
+  // This field is only present for the following task_types:
+  // - discover-ec2
+  //
+  // PostHog property: tp.usertask.discover_ec2.instances_count
+  int32 instances_count = 4;
+}
+
 // UsageEventOneOf is a message that can accept a oneof of any supported
 // external usage event.
 message UsageEventOneOf {
@@ -785,6 +817,7 @@ message UsageEventOneOf {
     UIDiscoverCreateAppServerEvent ui_discover_create_app_server_event = 57;
     AccessGraphAWSScanEvent access_graph_aws_scan_event = 58;
     UIAccessGraphCrownJewelDiffViewEvent ui_access_graph_crown_jewel_diff_view = 59;
+    UserTaskStateEvent user_task_state_event = 60;
   }
   reserved 2; //UIOnboardGetStartedClickEvent
   reserved "ui_onboard_get_started_click";