fix(derived_code_mappings): Fix (#86109)

Fix for regression #86026.

Author: armenzg

Diff for: src/sentry/issues/auto_source_code_config/stacktraces.py

@@ -37,6 +37,9 @@ def get_stacktraces(data: NodeData | dict[str, Any]) -> list[dict[str, Any]]:
     if exceptions:
         return [e["stacktrace"] for e in exceptions if get_path(e, "stacktrace", "frames")]
 
-    # This section is only used as part of the tests
-    # Ideally, we should fix the tests to pass the correct data
-    return [data["stacktrace"]]
+    stacktrace = data.get("stacktrace")
+    if stacktrace and stacktrace.get("frames"):
+        logger.warning("Investigate if we use this code path in production.")
+        return [stacktrace]
+
+    return []