Investigate test failures where last log is "Starting kernel ..."

[An example](https://staging.kernelci.org:9000/viewer?node_id=67068d7a7ef7358befbe0472):
```
Command line loaded dynamically from TFTP file: 15981174/tftp-deploy-bgq8lbcx/kernel/cmdline
The command line is: earlyprintk=uart8250,mmio32,0xde000000,115200n8 console=ttyS0,115200n8 root=/dev/ram0 ip=dhcp tftpserverip=192.168.201.1
Shutting down all USB controllers.
Removing current net device
EC: exit firmware mode
Finalizing coreboot
Exiting depthcharge with code 4 at timestamp: 47938675
Starting kernel ...
```
Examples:
[1](https://kcidb.kernelci.org/d/test/test?var-datasource=edquppk2ghfcwc&var-origin=maestro&var-build_architecture=$__all&var-build_config_name=$__all&var-id=maestro:675b040bca49c97d29998d13&from=now-100y&to=now&timezone=browser&var-test_path=&var-issue_presence=$__all)
[2](https://kcidb.kernelci.org/d/test/test?var-datasource=edquppk2ghfcwc&var-origin=maestro&var-build_architecture=$__all&var-build_config_name=$__all&var-id=maestro:675b0409ca49c97d29998cff&from=now-100y&to=now&timezone=browser&var-test_path=&var-issue_presence=$__all)
[3](https://kcidb.kernelci.org/d/test/test?var-datasource=edquppk2ghfcwc&var-origin=maestro&var-build_architecture=$__all&var-build_config_name=$__all&var-id=maestro:675b0408ca49c97d29998cea&from=now-100y&to=now&timezone=browser&var-test_path=&var-issue_presence=$__all)
[4](https://kcidb.kernelci.org/d/test/test?var-datasource=edquppk2ghfcwc&var-origin=maestro&var-build_architecture=$__all&var-build_config_name=$__all&var-id=maestro:675b040cca49c97d29998d22&from=now-100y&to=now&timezone=browser&var-test_path=&var-issue_presence=$__all)
[5](https://kcidb.kernelci.org/d/test/test?var-datasource=edquppk2ghfcwc&var-origin=maestro&var-build_architecture=$__all&var-build_config_name=$__all&var-id=maestro:675b040cca49c97d29998d2f&from=now-100y&to=now&timezone=browser&var-test_path=&var-issue_presence=$__all)
[6](https://kcidb.kernelci.org/d/test/test?var-datasource=edquppk2ghfcwc&var-origin=maestro&var-build_architecture=$__all&var-build_config_name=$__all&var-id=maestro:675b040cca49c97d29998d2c&from=now-100y&to=now&timezone=browser&var-test_path=&var-issue_presence=$__all)

Start by comparing the staging example with the six linked Grafana test views and their logs, focusing on cases whose final line is "Starting kernel ...". Done means documenting the failure pattern and identifying the affected test-handling area or a reproducible cause; the issue names no source file or test entry point.

Written by the indexing model from the issue text.