ref(feedback): temp metric to monitor replay context behavior (#96775)

Relates to the TODO on L95. In beta we had some test endpoints to
manually ingest feedback. We shouldn't need this case anymore since
replay context is filled in by relay. Using a metric to confirm

Author: aliu39

src/sentry/feedback/usecases/ingest/create_feedback.py

@@ -97,6 +97,9 @@ def fix_for_issue_platform(event_data: dict[str, Any]) -> dict[str, Any]:
     if not event_data["contexts"].get("replay") and event_data["contexts"].get("feedback", {}).get(
         "replay_id"
     ):
+        # Temporary metric to confirm this behavior is no longer needed.
+        metrics.incr("feedback.create_feedback_issue.filled_missing_replay_context")
+
         ret_event["contexts"]["replay"] = {
             "replay_id": event_data["contexts"].get("feedback", {}).get("replay_id")
         }