Grafana dashboard: Siid Monitor
Description: siid running status monitor

- siid_max: 当前窗口最大的siid Gauge  
- siid_n_left: 剩余可分配的数量 Gauge  
- siid_next: 调用Next()的计数 Counter  
- siid_next_with_hash: 调用NextWithHash()的计数 Counter
- siid_quantum: 滑动窗口的大小 Gauge  

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