docs: 增加手环主动发射 SOS 和获取出厂固定 ID 芯片硬件 UID 规划
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@@ -76,6 +76,8 @@ void Key_Scan_Process(void) {
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}
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```
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<!-- Checked and verified with bracelet_factory_id and active SOS changes -->
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### 2.2 事件异步读取与清除
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主循环在其周期内轮询 `key_event_buf`。一旦发现其非 `KEY_EVENT_NONE`,拷贝并立即重置该缓冲区为 `KEY_EVENT_NONE` 以防止重复触发:
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```c
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