fix(llm-detector): Update how transaction/trace are sent in occurrence (#103091)

this pr updates the llm issue detection to now send trace/transaction as
tags - because they weren't being sent as event data, the span evidence
section wasn't working for these issues
fixes
https://linear.app/getsentry/issue/ID-1079/fix-span-evidence-section-on-issue-details

Author: roggenkemper

src/sentry/tasks/llm_issue_detection.py

@@ -129,9 +129,12 @@ def create_issue_occurrence_from_detection(
         "platform": project.platform or "other",
         "received": detection_time.isoformat(),
         "timestamp": detection_time.isoformat(),
-        "tags": {
-            "trace_id": trace.trace_id,
-            "transaction": transaction_name,
+        "transaction": transaction_name,
+        "contexts": {
+            "trace": {
+                "trace_id": trace.trace_id,
+                "type": "trace",
+            }
         },
     }
 

tests/sentry/tasks/test_llm_issue_detection.py

@@ -118,8 +118,7 @@ def test_create_issue_occurrence_from_detection(self, mock_produce_occurrence):
         event_data = call_kwargs["event_data"]
         assert event_data["project_id"] == self.project.id
         assert event_data["platform"] == "other"
-        assert event_data["tags"]["trace_id"] == "abc123xyz"
-        assert event_data["tags"]["transaction"] == "test_transaction"
+        assert event_data["contexts"]["trace"]["trace_id"] == "abc123xyz"
         assert "event_id" in event_data
         assert "received" in event_data
         assert "timestamp" in event_data