feat: 规则审计-策略新增/编辑-后端接口 --story=121513458

[0RAJA]

【新增】

1. 策略 link_table 支持为 null
2. 调整规则审计策略 SQL

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 94.73684% with 1 line in your changes missing coverage. Please review.

Project coverage is 63.14%. Comparing base (963b126) to head (7afc132).
Report is 3 commits behind head on feat_rule_audit.

Files with missing lines	Patch %	Lines
src/backend/services/web/strategy_v2/resources.py	50.00%	1 Missing ⚠️

Additional details and impacted files

@@                 Coverage Diff                 @@
##           feat_rule_audit     #516      +/-   ##
===================================================
+ Coverage            63.12%   63.14%   +0.01%     
===================================================
  Files                  531      531              
  Lines                17898    17907       +9     
===================================================
+ Hits                 11299    11308       +9     
  Misses                6599     6599              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.