[codex] Fix Freebuff 429 error messaging #737

Job	Run time
build-and-smoke-freebuff-windows	3m 12s
build-freebuff	1m 20s
e2e-slash-commands	58s
e2e-ads-behavior	1m 9s
e2e-version	1m 2s
e2e-agent-startup	2m 9s
e2e-startup	1m 0s
e2e-help-command	1m 4s
e2e-code-edit	1m 8s
e2e-terminal-command	1m 8s
	14m 10s

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