fix(portal): fix typo in ko-kr placeholder and update strings

[g-yunjh]

This PR updates the Korean translation file (ko-kr-lang.json) to improve coverage and accuracy.

Key Changes:

• Fix Syntax Error: Fixed a broken placeholder in the SCAN_BY key where a closing brace was missing ({{scanner} -> {{scanner}}).
• Update Translations: Translated previously untranslated keys such as MANDATORY, OVERRIDE, SIMPLE, ADVANCED, and STOP.
• Refine Wording: Improved various UI strings to make them more natural and consistent with the context (e.g., Replication rules, Audit logs).

Issue being fixed

Fixes #22613

Please indicate you've done the following:

• Well Written Title and Summary of the PR
• Label the PR as needed. "release-note/ignore-for-release, release-note/new-feature, release-note/update, release-note/enhancement, release-note/community, release-note/breaking-change, release-note/docs, release-note/infra, release-note/deprecation"
• Accepted the DCO. Commits without the DCO will delay acceptance.
• Made sure tests are passing and test coverage is added if needed.
• Considered the docs impact and opened a new docs issue or PR with docs changes if needed in website repository.

[wy65701436]

lgtm, thanks.

[chlins]

lgtm

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 65.84%. Comparing base (c8c11b4) to head (64a8563).
⚠️ Report is 604 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main   #22617       +/-   ##
===========================================
+ Coverage   45.36%   65.84%   +20.47%     
===========================================
  Files         244     1073      +829     
  Lines       13333   116095   +102762     
  Branches     2719     2931      +212     
===========================================
+ Hits         6049    76440    +70391     
- Misses       6983    35414    +28431     
- Partials      301     4241     +3940     

Flag	Coverage Δ
unittests	65.84% <ø> (+20.47%)	⬆️

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[bupd]

/lgtm