feat(credential_store): default keyring backend to OS-only, add keyring-with-file option#488

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cross32768 wants to merge 3 commits intogoogleworkspace:mainfrom

cross32768:feat/keyring-only-backend

Commits on Mar 14, 2026

feat(credential_store): default keyring backend to OS-only, add keyring-with-file option
cross32768
committed
fix(credential_store): return an error when keyring-only key persistence fails
cross32768
committed
fix(credential_store): atomic write for save_key_file to prevent corruption on crash (Address review feedback from gemini-code-assist)
cross32768
committed