Tracking: Hash Field Expiration (HFE) implementation

[PragmaTwice]

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Motivation

Proposal: #3432

This issue is to track the implementation of HFE.

Task list:

• feat(hash): initialize field expiration metadata and subkey en/decoding #3444
• feat(commands): expose hash, list and json metadata in kmetadata #3454
• feat(hash): track persistent hash fields & support hash field expiration commands #3472
• feat(hash): implement hlen scan repair #3501
• feat(hash): support HFE compaction filter #3503
• feat(hash): add HFE expire and TTL commands #3506
• Add support of command HSETEX
• Implement a background thread and a dedicated index column family to actively clean up cold expired fields (optional)

Solution

No response

Are you willing to submit a PR?

• I'm willing to submit a PR!

[nagisa-kunhah]

@PragmaTwice Hi, I'd like to help with the HFE work. I'm interested in taking the HLEN fast-path and SCAN_AND_REPAIR part of this task. Could you assign it to me?