[Bug] Subagents switch to models not defined in our LLM tiers config

[awrobel-gd]

Description

Subagents spawned by Rosetta workflows still can sometimes just use "sonnet" or "opus" without version in name skipping our model config totally for this run.

Known issue?
https://www.reddit.com/r/ClaudeCode/comments/1rlbsuw/subagent_masters_beware_you_cant_select_model/