spark: update validation report with manifest

wizard-work/spark/VALIDATION_REPORT.md

@@ -21,4 +21,11 @@ All Hermes environment checks passed:
 - Host: Linux (6.8.0-71-generic)
 - User: root
 - Profile: spark
-- Scratch: /root/.hermes/profiles/spark/cache/scratch
+- Scratch: /root/.hermes/profiles/spark/cache/scratch
+
+---
+# MANIFEST
+spark-validation-script-v1.0
+artifact: wizard-work/spark/validation_script.sh
+commit: 23eaa56
+date: 2026-10-23