include signal name and number for signaled exits #51

Job	Run time
Security: Filesystem Isolation (File Privacy)	59s
Security: Network Namespace (Localhost Bridge)	54s
Security: Memory Limit (Hard OOM)	58s
Resource: Fork Bomb Containment	1m 1s
Resilience: Signal Trap Uses SIGKILL Timeout	54s
Resilience: Orphan Grandchild Reaping	56s
Resilience: I/O Flood (Bounded Stderr)	1m 11s
Resilience: Inode Exhaustion Safety	55s
Resilience: Privileged Syscall Denial	1m 3s
Security: Disk Cleanup (Storage Exhaustion)	56s
	9m 47s

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