ensure email notice includes details on multiple models involved in run if multiple were used #606

For example, did this run use grok for security review?

Result: failed
Pull request: #605
Cause: Security review incomplete: session failed, ended early or omitted a valid final line; see Session log
Session log: /home/jacob/.thirdshift/logs/JacobStephens2/thirdshift/sessions/596-20261009T201522-0400-security-review.jsonl
Command log: /home/jacob/.thirdshift/logs/JacobStephens2/thirdshift/commands/issue/596-20261009T201522-0400.log
Built with codex · gpt-6.1-sol · high
Host: thirdshift
Took: 35m 41s