feat: adaptive admission rate limiter

[MrCroxx]

Dynamically adjust the admission rate based on the sampling.

[xudong963]

Hey there, does the issue plan to implement the frequency-based admission control for tinyLFU?

[MrCroxx]

Hey there, does the issue plan to implement the frequency-based admission control for tinyLFU?

Actually not, it is for disk cache admission policy. However, I'm open and happy to introduce frequency-based admission control for tinyLFU. Do you have some ideas or would like to contribute? 🥰

[xudong963]

As far as I know, Moka's tinyLFU supports the frequency-based admission control

the admission policy based on the historical popularity of keys

We could use the core of it to wrap into the foyer's Eviction trait