baseline repo groups

[derek-ho]

Description

[Describe what this change achieves]

Issues Resolved

Fix #1337

Check List

• New functionality includes testing.
  • All tests pass, including unit test, integration test and doctest
• New functionality has been documented.
  • New functionality has javadoc added
  • New functionality has user manual doc added
• Commits are signed per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[codecov-commenter]

Codecov Report

Merging #1384 (b147bcd) into main (b826835) will decrease coverage by 1.51%.
The diff coverage is n/a.

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@@             Coverage Diff              @@
##               main    #1384      +/-   ##
============================================
- Coverage     99.96%   98.46%   -1.51%     
- Complexity     2464     3846    +1382     
============================================
  Files           220      345     +125     
  Lines          5833     9553    +3720     
  Branches        359      613     +254     
============================================
+ Hits           5831     9406    +3575     
- Misses            2      142     +140     
- Partials          0        5       +5     

Flag	Coverage Δ
sql-engine	98.46% <ø> (-1.51%)	⬇️

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see 139 files with indirect coverage changes

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[Yury-Fridlyand]

According to opensearch-project/.github#125:

4. Add active maintainers to CODEOWNERS.

The proposed CODEOWNERS list has much more people than listed in MAINTAINERS.md. I think repo/organization admins like Charlotte (CEHENKLE) can do whatever they need with the repository without being listed in CODEOWNERS. This just subscribes them to spam aka PR open/close.