feat!: intents 只按大类订阅、群消息全量模式与事件流优化

破坏性变更：intents.toml 订阅粒度收敛到 Intents 大类（分组）——
配置从「[分组] 表内逐事件开关」改为「分组名 = true/false」。网关只接受
分组位掩码，组内事件本就无法单独订阅，此前的逐事件开关仅是「组内任一
为 true 即订阅整组」的装饰。旧格式不再兼容，与拼错的分组名、非布尔值
一样在启动时直接抛 ValueError，而非静默少订阅。

新增：
- GROUP_MESSAGE_CREATE 事件接收（群消息全量模式，与 GROUP_AT_MESSAGE_CREATE
  共用 GroupAtMessage）；GroupAtMessage 补齐 message_type/message_scene/
  attachments/mentions/ark_data/msg_elements 字段

优化：
- 形参注入缓存化：合并缓存 handler 签名与类型标注解析（此前每条事件都重跑
  inspect.signature/get_type_hints），services 命中改为每条事件实时判定，
  保证「先注册 handler、后登记组件」的既有装配顺序不受影响
- EventQueue.put_event/put_reply 去掉多余的 return await
- model.NoneType 联合成员顺序调整（None 置于末尾）

文档同步 GUIDE/API/README/CHANGELOG 与示例；测试 76 全绿，ruff/pyright 干净。

tests/test_payloads.py

@@ -28,6 +28,53 @@ def test_parse_group_at_message():
     assert msg.author is not None and msg.author.member_openid == "M1"
 
 
+def test_parse_group_full_message():
+    msg = parse_event(
+        "GROUP_MESSAGE_CREATE",
+        {
+            "author": {"member_openid": "M2"},
+            "content": "大家好",
+            "group_openid": "G1",
+            "id": "msgid-2",
+            "timestamp": "2026-01-01",
+            "message_type": 0,
+            "message_scene": {"unknown": False},
+            "attachments": [{"content_type": 1, "url": "https://x/img.png"}],
+            "mentions": [{"id": "U1"}],
+            "msg_elements": [{"type": 1, "text_element": {"content": "大家好"}}],
+        },
+    )
+    assert isinstance(msg, GroupAtMessage)
+    assert msg.group_openid == "G1"
+    assert msg.user_openid == "M2"
+    assert msg.message_type == 0
+    assert msg.message_scene == {"unknown": False}
+    assert msg.attachments == [{"content_type": 1, "url": "https://x/img.png"}]
+    assert msg.mentions == [{"id": "U1"}]
+    assert msg.msg_elements == [{"type": 1, "text_element": {"content": "大家好"}}]
+
+
+async def test_group_full_message_reaches_typed_handler():
+    queue = EventQueue()
+    emitter = EventEmitter(queue)
+    received: list[GroupAtMessage] = []
+
+    @emitter.on("GROUP_MESSAGE_CREATE")
+    async def handler(msg: GroupAtMessage):
+        received.append(msg)
+
+    await emitter.emit(
+        {
+            "op": Opcode.DISPATCH,
+            "t": "GROUP_MESSAGE_CREATE",
+            "d": {"content": "hi", "group_openid": "G1"},
+        }
+    )
+    assert len(received) == 1
+    assert received[0].content == "hi"
+    assert received[0].group_openid == "G1"
+
+
 def test_parse_c2c_message():
     msg = parse_event(
         "C2C_MESSAGE_CREATE",