[Rule based auto-tagging] add rule sync service

[kaushalmahi12]

Description

This change adds a periodically running thread to refresh the current in-memory Rules view from RULES system index.

Related Issues

#16797 (comment)
#13341

Check List

• Functionality includes testing.
• API changes companion pull request created, if applicable.
• Public documentation issue/PR created, if applicable.

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[github-actions]

❌ Gradle check result for 63d6678: FAILURE

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❌ Gradle check result for 18845df: FAILURE

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❌ Gradle check result for 313ec6f: FAILURE

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❌ Gradle check result for ac1f160: null

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❌ Gradle check result for 702819e: FAILURE

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❌ Gradle check result for 0ec1abe: FAILURE

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❌ Gradle check result for 491746a: FAILURE

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[github-actions]

✅ Gradle check result for 1a0a9e6: SUCCESS

[codecov]

Codecov Report

Attention: Patch coverage is 98.14815% with 2 lines in your changes missing coverage. Please review.

Project coverage is 72.69%. Comparing base (4d6f8ba) to head (1a0a9e6).
Report is 5 commits behind head on main.

Files with missing lines	Patch %	Lines
...lugin/wlm/rule/sync/RefreshBasedSyncMechanism.java	94.73%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #18128      +/-   ##
============================================
+ Coverage     72.67%   72.69%   +0.01%     
- Complexity    67881    67920      +39     
============================================
  Files          5516     5521       +5     
  Lines        312443   312539      +96     
  Branches      45360    45365       +5     
============================================
+ Hits         227067   227190     +123     
+ Misses        66893    66843      -50     
- Partials      18483    18506      +23     

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