feat: daily node restart controlled from the admin, connect timings as a default line task [CI]

Agents and Probes exit in order at a configured time (default 04:30 UTC+8, switch and time zone in the admin settings) and the service manager starts them again; a local restart_at or MOSHIRO_RESTART_AT wins. The connect kind (TCP connect and TLS handshake timings) is now a default continuous line template, with a section on the line page.

backend/tests/MoShiro.TestSupport/AgentSimulator.cs

@@ -51,6 +51,9 @@ public sealed class AgentSimulator : IAsyncDisposable
     /// <summary>面板发来的发布清单（<c>moshiro.update.offer</c>）和更新请求（<c>moshiro.update.apply</c>）。</summary>
     public ConcurrentQueue<UpdateOfferParams> UpdateOffers { get; } = new();
 
+    /// <summary>面板下发的定时重启设置（<c>moshiro.schedule</c>），按到达顺序。</summary>
+    public ConcurrentQueue<ScheduleParams> Schedules { get; } = new();
+
     private int _updateApplies;
 
     public int UpdateApplies => Volatile.Read(ref _updateApplies);
@@ -406,6 +409,9 @@ public sealed class AgentSimulator : IAsyncDisposable
             case MoShiroMethods.UpdateOffer:
                 UpdateOffers.Enqueue(message.Params!.Value.Deserialize(MoShiroJsonContext.Default.UpdateOfferParams)!);
                 break;
+            case MoShiroMethods.Schedule:
+                Schedules.Enqueue(message.Params!.Value.Deserialize(MoShiroJsonContext.Default.ScheduleParams)!);
+                break;
             case MoShiroMethods.UpdateApply:
                 Interlocked.Increment(ref _updateApplies);
                 break;