submodule对gitea不管用，所以直接拉了一份拉格兰

Lagrange.Core/Lagrange.OneBot/Core/Entity/Meta/OneBotHeartBeat.cs

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+using System.Text.Json.Serialization;
+
+namespace Lagrange.OneBot.Core.Entity.Meta;
+
+[Serializable]
+public class OneBotHeartBeat(uint selfId, int interval, object status) : OneBotMeta(selfId, "heartbeat")
+{
+    [JsonPropertyName("interval")] public int Interval { get; set; } = interval;
+
+    [JsonPropertyName("status")] public object Status { get; set; } = status;
+}

Lagrange.Core/Lagrange.OneBot/Core/Entity/Meta/OneBotLifecycle.cs

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+using System.Text.Json.Serialization;
+
+namespace Lagrange.OneBot.Core.Entity.Meta;
+
+[Serializable]
+public class OneBotLifecycle(uint selfId, string subType) : OneBotMeta(selfId, "lifecycle")
+{
+    [JsonPropertyName("sub_type")] public string SubType { get; set; } = subType;
+}

Lagrange.Core/Lagrange.OneBot/Core/Entity/Meta/OneBotMeta.cs

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+using System.Text.Json.Serialization;
+
+namespace Lagrange.OneBot.Core.Entity.Meta;
+
+[Serializable]
+public abstract class OneBotMeta(uint selfId, string metaEventType) : OneBotEntityBase(selfId, "meta_event")
+{
+    [JsonPropertyName("meta_event_type")] public string MetaEventType { get; set; } = metaEventType;
+}

Lagrange.Core/Lagrange.OneBot/Core/Entity/Meta/OneBotStatus.cs

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+using System.Text.Json.Serialization;
+
+namespace Lagrange.OneBot.Core.Entity.Meta;
+
+[Serializable]
+public class OneBotStatus(bool online, bool good)
+{
+    [JsonPropertyName("app_initialized")] public bool AppInitialized { get; set; } = true;
+
+    [JsonPropertyName("app_enabled")] public bool AppEnabled { get; set; } = true;
+
+    [JsonPropertyName("app_good")] public bool AppGood { get; set; } = true;
+
+    [JsonPropertyName("online")] public bool Online { get; set; } = online;
+
+    [JsonPropertyName("good")] public bool Good { get; set; } = good;
+}