meta/quota: fix quota list

[Xuyuchao-juice]

1. Skip quota entries that have no limits set (MaxSpace=-1 and MaxInodes=-1) when listing quotas.

rel: #6722

[Copilot]

Pull request overview

This PR cleans up stale user/group quota entries (those with no limits and no usage) from Redis, and skips displaying quota entries with no limits set when listing quotas.

Changes:

• Skip user/group quota entries with MaxSpace=-1 and MaxInodes=-1 when listing quotas in handleQuotaList
• In Redis doLoadQuotas, delete stale quota entries that have no limits and zero usage
• In Redis doFlushQuotas, use HSetNX to create a placeholder quota entry (-1, -1) when flushing usage increments, ensuring the quota key exists for scanning

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
pkg/meta/quota.go	Filter out user/group quotas with no limits from listing results
pkg/meta/redis.go	Delete stale no-limit/no-usage quota entries during load; create placeholder quota entries during flush with HSetNX

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[Xuyuchao-juice]

[codecov]

Codecov Report

❌ Patch coverage is 36.66667% with 19 lines in your changes missing coverage. Please review.
✅ Project coverage is 22.77%. Comparing base (86d7f0f) to head (4627729).
⚠️ Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/meta/redis.go	0.00%	15 Missing ⚠️
pkg/meta/quota.go	73.33%	2 Missing and 2 partials ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #6737       +/-   ##
===========================================
- Coverage   48.70%   22.77%   -25.93%     
===========================================
  Files         133       31      -102     
  Lines       44260    22493    -21767     
===========================================
- Hits        21555     5123    -16432     
+ Misses      20204    16798     -3406     
+ Partials     2501      572     -1929     

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