v1.3.51 - Guide session and permission changes

Add focused reconstruction guidance for account/workspace changes, logout/expiry, re-authentication and permission transitions. Recover identity/lifetime, displayed/cache data, owner-bound draft restoration, pending effects and safe recovery without confusing local invalidation with service enforcement or rollback.

Include one dependency-free, same-author proposed-policy example: 140 literal checkpoints in 23 sequences and 16 distinguishing faulty variants after ordinary controls. It uses simulated identity/grants, volatile retained work and controlled promises, with no claim of real authentication, authorization, revocation, storage durability, original parity or model quality.

Keep installer/updater, integration, consent and compatibility behavior unchanged. See the repository example and portable reference for finite coverage and limitations.