feat(oss): rank content lists by spam score (last-N-days triage)

[mashbean]

背景

OSS 後台要能「一週內垃圾機率由高到低」檢視文章/動態/留言。但 comment/moment 清單原本只支援 id desc、article 清單沒有依 spam 分數排序。

變更

• ArticlesSort.mostSpam：依 spam_score 由高到低排序（只含已評分文章）。
• 新增 OSSCommentsInput / OSSMomentsInput：sort（OSSContentSpamSort：newest / mostSpam）＋ filter.datetimeRange（近 7 天窗）。
• comments / moments resolver 改用 connectionFromQuery 可排序/篩選；新增 commentService.findComments() 查詢建構子。
• mostSpam 以 whereNotNull(spam_score) 排除未評分項，避免 NULLS-first 排序污染排行。
• schema 產物（schema.graphql / schema.d.ts）手動同步（本機 codegen 版本與 committed 版本漂移，避免無關重排）。

備註

• 未加 DB 級排序測試（需帶 spam_score 的 fixture）；查詢建構簡單，建議於 staging 實測。
• 對應前端 PR：thematters/matters-oss feat/oss-spam-ranking。
• 本 PR 需先於前端部署（前端送出新的 input 欄位，舊 schema 會拒）。

🤖 Generated with Claude Code

[codecov]

Codecov Report

❌ Patch coverage is 77.77778% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 72.93%. Comparing base (086cd37) to head (915098c).
⚠️ Report is 31 commits behind head on develop.

Files with missing lines	Patch %	Lines
src/queries/system/oss/articles.ts	0.00%	4 Missing ⚠️
src/queries/system/oss/comments.ts	90.90%	1 Missing ⚠️
src/queries/system/oss/moments.ts	90.90%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #4856      +/-   ##
===========================================
+ Coverage    72.57%   72.93%   +0.36%     
===========================================
  Files         1067     1068       +1     
  Lines        21164    21541     +377     
  Branches      4619     4802     +183     
===========================================
+ Hits         15360    15712     +352     
- Misses        5327     5347      +20     
- Partials       477      482       +5     

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