chore(datastreams): separate DSM specific test behavior and add to CODEOWNERS

[robcarlan-datadog]

What does this PR do?

Splits DSM specific tests into their own test files, and updates CODEOWNERS so that the DSM team owns these tests.

Tests still run e.g.:
amqplib: https://github.com/DataDog/dd-trace-js/actions/runs/20139301302/job/57801733910?pr=7076#step:4:492
confluentinc-kafka-javascript: https://github.com/DataDog/dd-trace-js/actions/runs/20139301302/job/57801734114?pr=7076#step:7:410
kafkajs: https://github.com/DataDog/dd-trace-js/actions/runs/20139301302/job/57801734472?pr=7076#step:7:49

Motivation

Plugin Checklist

• Unit tests.
• Integration tests.
• Benchmarks.
• TypeScript definitions.
• TypeScript tests.
• API documentation.
• CI jobs/workflows.

Additional Notes

[github-actions]

Overall package size

Self size: 3.57 MB
Deduped: 4.46 MB
No deduping: 4.46 MB

Dependency sizes

| name | version | self size | total size | |------|---------|-----------|------------| | import-in-the-middle | 1.15.0 | 127.66 kB | 856.24 kB | | dc-polyfill | 0.1.10 | 26.73 kB | 26.73 kB |

_{🤖 This report was automatically generated by heaviest-objects-in-the-universe}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.82%. Comparing base (237ea96) to head (339f97a).
⚠️ Report is 9 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #7076      +/-   ##
==========================================
+ Coverage   84.80%   84.82%   +0.02%     
==========================================
  Files         514      515       +1     
  Lines       21987    22022      +35     
==========================================
+ Hits        18646    18681      +35     
  Misses       3341     3341              

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[pr-commenter]

Benchmarks

Benchmark execution time: 2025-12-11 22:25:47

Comparing candidate commit 339f97a in PR branch rob.carlan/DSMON-1162-dsm-test-ownership with baseline commit 237ea96 in branch master.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 293 metrics, 27 unstable metrics.

[datadog-datadog-prod-us1]

⚠️ Tests

⚠️ Warnings

🧪 1 Test failed

❄️ Known flaky: tests.parametric.test_otel_span_methods.Test_Otel_Span_Methods.test_otel_get_span_context[library_env0, parametric-nodejs] from system_tests_suite (Datadog) (Fix with Cursor)

AssertionError: assert '000ad69bfa8bddfa' == '3050715178851834'
  - 3050715178851834
  + 000ad69bfa8bddfa

self = <tests.parametric.test_otel_span_methods.Test_Otel_Span_Methods object at 0x7f61d4f62090>
test_agent = <utils.docker_fixtures._test_agent.TestAgentAPI object at 0x7f61d28952e0>
test_library = <utils.docker_fixtures._test_clients._test_client_parametric.ParametricTestClientApi object at 0x7f61d2706900>

    @bug(context.library < "[email protected]", reason="APMRP-360")
    @missing_feature(context.library == "rust", reason="APMSP-2059")
...

ℹ️ Info

❄️ No new flaky tests detected

<sub>This comment will be updated automatically if new data arrives.
* Fix with Cursor requires Datadog plugin ≥v2.17.0
🔗 Commit SHA: 339f97a | Docs | Datadog PR Page | Was this helpful? Give us feedback!</sub>