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/src/MoShiro.Backend.Application/ApplicationServiceCollectionExtensions.cs

@@ -37,6 +37,7 @@ public static class ApplicationServiceCollectionExtensions
         services.AddSingleton<AuthService>();
         services.AddSingleton<SettingsService>();
         services.AddSingleton<ReleaseService>();
+        services.AddSingleton<ScheduleService>();
         services.AddSingleton<BackendUpdates>();
         services.AddHostedService(p => p.GetRequiredService<BackendUpdates>());
         services.AddSingleton<JoinTokenService>();