[Enhancement] Support file cache LRU queue dump and check

[gavinchou]

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Description

Here's the English translation for your GitHub issue, optimized for clarity and technical accuracy:

​​Reconciliation Algorithm:​​

1. After taking an LRU snapshot from memory, record the current time as ​​T₀​​.
2. Then scan all files on disk. Any file that meets ​​both​​ criteria below is flagged as leaked:
   1. Created ​​before T₀​​
      ​​ 2. Not present​​ in the LRU snapshot

Solution

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[freemandealer]

similar to the work here #41280
maybe we should use this as the base instead of developing new?

I understood that the purpose is different between the two issues: 53495 is intented to check from time to time use the lockless dumped queue info while 41280 is one shot check that use cache lock to 'pause' the system. but the checking logic itself may be in common.