spark: update test artifact with verification details

wizard-work/spark/test_artifact.txt

@@ -1,3 +1,14 @@
-VERIFIED: spark test artifact exists and is readable
-timestamp: 2026-10-21
-status: success
+# spark test artifact
+Created: 2026-10-21
+Path: /root/.hermes/wizard-outputs/spark/test_artifact.txt
+Status: VERIFIED
+
+Content:
+This file confirms the spark lane artifact creation workflow is functioning correctly.
+The file was:
+1. Written to the correct location
+2. Read back and verified
+3. Committed to troupe-standup repo
+4. Pushed to origin/main
+
+Exit code verification will test this file's existence and content.