RHINENG-23998: add codeowners to own all

[TenSt]

Associated Jira ticket: #RHINENG-23998

Based on the latest security requirements all the code inside the repo is required to be approved by codeowners.

Summary by Sourcery

Build:

• Introduce a .github/CODEOWNERS file to enforce mandatory code owner review for all repository changes.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Adds a new GitHub CODEOWNERS file so that all code in the repository is covered by code owners for mandatory review/approval per security requirements.

File-Level Changes

Change	Details	Files
Introduce repository-wide CODEOWNERS configuration to require code owner approval for all files.	Create a new .github/CODEOWNERS file in the repository. Configure ownership patterns so that all files in the repo are matched by at least one code owner entry, enforcing code-owner review before merges.	.github/CODEOWNERS

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[github-actions]

SC Environment Impact Assessment

Overall Impact: ⚪ NONE

No SC Environment-specific impacts detected in this PR.

What was checked

This PR was automatically scanned for:

• Database migrations
• ClowdApp configuration changes
• Kessel integration changes
• AWS service integrations (S3, RDS, ElastiCache)
• Kafka topic changes
• Secrets management changes
• External dependencies

[sourcery-ai]

Hey - I've left some high level feedback:

• The new .github/CODEOWNERS file is empty in this diff, so it will not enforce any ownership rules; consider adding the appropriate wildcard pattern(s) and owner(s) so the security requirement is actually satisfied.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- The new `.github/CODEOWNERS` file is empty in this diff, so it will not enforce any ownership rules; consider adding the appropriate wildcard pattern(s) and owner(s) so the security requirement is actually satisfied.

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 59.45%. Comparing base (d7795d6) to head (e4548a8).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2088   +/-   ##
=======================================
  Coverage   59.45%   59.45%           
=======================================
  Files         134      134           
  Lines        8699     8699           
=======================================
  Hits         5172     5172           
  Misses       2981     2981           
  Partials      546      546           

Flag	Coverage Δ
unittests	59.45% <ø> (ø)

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