chore(llmobs): add codeowner entries for oai_agents integration

[Yun-Kim]

Adds codeowner entries that were accidentally omitted in #13081.

Checklist

• PR author has checked that all the criteria below are met
• The PR description includes an overview of the change
• The PR description articulates the motivation for the change
• The change includes tests OR the PR description describes a testing strategy
• The PR description notes risks associated with the change, if any
• Newly-added code is easy to change
• The change follows the library release note guidelines
• The change includes or references documentation updates if necessary
• Backport labels are set (if applicable)

Reviewer Checklist

• Reviewer has checked that all the criteria below are met
• Title is accurate
• All changes are related to the pull request's stated goal
• Avoids breaking API changes
• Testing strategy adequately addresses listed risks
• Newly-added code is easy to change
• Release note makes sense to a user of the library
• If necessary, author has acknowledged and discussed the performance implications of this PR as reported in the benchmarks PR comment
• Backport labels are set in a manner that is consistent with the release branch maintenance policy

[github-actions]

CODEOWNERS have been resolved as:

.github/CODEOWNERS                                                      @DataDog/python-guild @DataDog/apm-core-python

[github-actions]

Bootstrap import analysis

Comparison of import times between this PR and base.

Summary

The average import time from this PR is: 234 ± 4 ms.

The average import time from base is: 239 ± 7 ms.

The import time difference between this PR and base is: -5.0 ± 0.2 ms.

Import time breakdown

The following import paths have shrunk:

ddtrace.auto 2.176 ms (0.93%)

ddtrace.bootstrap.sitecustomize 1.501 ms (0.64%)

ddtrace.bootstrap.preload 1.501 ms (0.64%)

ddtrace.internal.products 1.501 ms (0.64%)

ddtrace.internal.remoteconfig.client 0.706 ms (0.30%)

ddtrace 0.675 ms (0.29%)

[pr-commenter]

Benchmarks

Benchmark execution time: 2025-04-10 23:20:27

Comparing candidate commit 8776c0a in PR branch yunkim/codeowner-oai-agent with baseline commit dee3673 in branch main.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 496 metrics, 2 unstable metrics.