LanMountainDesktop.Shared.Contracts/Update/DeploymentLock.cs

using System;

namespace LanMountainDesktop.Shared.Contracts.Update;

public sealed record DeploymentLock(
    int SchemaVersion,
    string Kind,
    string TargetVersion,
    string PayloadPath,
    string? PayloadSha256,
    DateTimeOffset CreatedAtUtc);
Add install checkpoint/resume and DDSS workflows Introduce install checkpoint support and resume logic for updates, plus related locking and validation. Adds InstallCheckpoint model, AppJsonContext serialization, and UpdatePaths helpers for deployment lock, apply-in-progress lock and install-checkpoint path. UpdateEngineService gains checkpoint load/save/delete, incoming-state validation, resume logic for PLONDS and legacy updates, apply lock handling, and safer cleanup; ApplyPendingPlondsUpdateAsync and ApplyPendingUpdate flow updated accordingly. Add DeploymentLock contract and extend UpdateState with pause/resume/cancel helpers. Tests updated to cover stale/valid checkpoint resume and legacy/PLONDS flows. CI: enhance ddss-publish to detect release channel, validate S3 assets, prepare and atomically publish channel pointer; add ddss-rollback workflow to publish rollbacks; adjust plonds-build concurrency and release events. 2026-05-12 08:35:48 +08:00			`using System;`

			`namespace LanMountainDesktop.Shared.Contracts.Update;`

			`public sealed record DeploymentLock(`
			`int SchemaVersion,`
			`string Kind,`
			`string TargetVersion,`
			`string PayloadPath,`
			`string? PayloadSha256,`
			`DateTimeOffset CreatedAtUtc);`