Scan failed event needs to be updated for supporting SBOM

[wy65701436]

We need to mention the type, like it is an sbom generation failure.

{"type":"SCANNING_FAILED","occur_at":1713857684,"operator":"admin","event_data":{"resources":[{"digest":"sha256:6cb561c92b5df3f5e399d9e30c8a8353d8b8012a90a50af26068dc2f54c390d0","resource_url":"10.206.88.128/redis/redis@sha256:6cb561c92b5df3f5e399d9e30c8a8353d8b8012a90a50af26068dc2f54c390d0","scan_overview":{"application/vnd.security.vulnerability.report; version=1.1":{"report_id":"4ca91558-f4a8-424c-a373-d1118c8a959b","scan_status":"Error","severity":"","duration":32,"summary":null,"start_time":"2024-04-23T07:26:16Z","end_time":"2024-04-23T07:26:48Z","complete_percent":0}}}],"repository":{"name":"redis","namespace":"redis","repo_full_name":"redis/redis","repo_type":"private"}}}