- Add mockDecryptPassword to vi.hoisted() so tests can control loadClientForUser behavior
- Add vi.mock for broker/crypto.js to enable CR-03 scenario
- Introduce wireMockChain() helper that differentiates credential vs outbox db selects
- CR-03 RED: credential-load failure must leave row pending, not call createFastmailClient('')
- WR-01 RED: first transient retry must use BACKOFF_SECONDS[0]=15s not BACKOFF_SECONDS[1]=60s
- Update FAKE_CRED_ROW so loadClientForUser can return a real credential-shaped row