* fix(auth): bootstrap codex cli credential without clobbering local
readCodexCliCredentialsCached was imported but never registered in
EXTERNAL_CLI_SYNC_PROVIDERS, so overlayExternalAuthProfiles could not
seed openai-codex:default on fresh agents and runtime surfaced
"No API key found for provider openai-codex" even after a successful
codex login.
Register the provider with a new bootstrapOnly flag. Providers flagged
bootstrapOnly are adopted only to fill an empty slot: the overlay skips
them when a local OAuth credential already exists for the profile, and
readExternalCliBootstrapCredential returns null so the refresh path
never replaces the locally stored canonical refresh token with stale
CLI state. Minimax keeps its existing replace-on-expiry behavior.
* test(auth): cover codex cli bootstrap
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Co-authored-by: sudol <sudol@A8Max.localdomain>
Co-authored-by: Peter Steinberger <steipete@gmail.com>