Sidecar/queue runner no longer needs job-specific context. API server resolves account details, IMAP auth, and user email at enqueue time — all persisted in the job file. Handler reads directly from job meta. Removed "Load account" step. Sync step auto-reconnects up to 10 times when Gmail drops the connection, resuming from saved UIDs. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>