fix(codex): ignore legacy model-valued MODEL_PROVIDER #47
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What
Why
Live tenant smoke showed Codex workspaces booting with MODEL=gpt-5.5 and legacy MODEL_PROVIDER=gpt-5.5. The adapter interpreted that model id as a provider override and returned not_configured, causing A2A 503s.
Brief-falsification log
Verification
Tier
L4 runtime adapter fix
Approved focused hotfix. Local parent verification: 60 passed across Codex modernization/provider/executor tests; subagent focused review found no blockers.
Approved focused hotfix. Local parent verification: 60 passed across Codex modernization/provider/executor tests; subagent focused review found no blockers.