fix(ai-proxy): avoid reserved key column in setting query

[sfwn]

What this PR does / why we need it:

AI-Proxy avoid MySQL reserved key column issue in setting query.

Which issue(s) this PR fixes:

• Fixes #your-issue_number
• Erda Cloud Issue Link

Specified Reviewers:

ChangeLog

Language	Changelog
🇺🇸 English	AI-Proxy avoid reserved key column issue in setting query
🇨🇳 中文	AI-Proxy 修复 setting 查询中 key 保留字导致的 SQL 问题

Need cherry-pick to release versions?

Add comment like /cherry-pick release/1.0 when this PR is merged.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 15.69%. Comparing base (976ab00) to head (3a513ff).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #6759   +/-   ##
=======================================
  Coverage   15.69%   15.69%           
=======================================
  Files        3988     3988           
  Lines      327396   327396           
=======================================
+ Hits        51393    51396    +3     
  Misses     270148   270148           
+ Partials     5855     5852    -3     

Flag	Coverage Δ
by-github-actions	15.69% <100.00%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
internal/apps/ai-proxy/models/setting/dbclient.go	31.77% <100.00%> (ø)

... and 4 files with indirect coverage changes

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[luobily]

/approve