Add API field and right for HeartbeatSeconds

src/Tgstation.Server.Api/Models/Internal/DreamDaemonLaunchParameters.cs

@@ -41,6 +41,12 @@ namespace Tgstation.Server.Api.Models.Internal
 		[Required]
 		public uint? StartupTimeout { get; set; }
 
+		/// <summary>
+		/// The number of seconds between each watchdog heartbeat. 0 disables.
+		/// </summary>
+		[Required]
+		public uint? HeartbeatSeconds { get; set; }
+
 		/// <summary>
 		/// Check if we match a given set of <paramref name="otherParameters"/>
 		/// </summary>

src/Tgstation.Server.Api/Rights/DreamDaemonRights.cs

@@ -71,6 +71,11 @@ namespace Tgstation.Server.Api.Rights
 		/// <summary>
 		/// User can change <see cref="Models.Internal.DreamDaemonLaunchParameters.StartupTimeout"/>
 		/// </summary>
-		SetStartupTimeout = 2048
+		SetStartupTimeout = 2048,
+
+		/// <summary>
+		/// User can change <see cref="Models.Internal.DreamDaemonLaunchParameters.HeartbeatSeconds"/>
+		/// </summary>
+		SetHeartbeatInterval = 4096,
 	}
 }