feat: add config DD_TRACE_RUNTIME_ID_ENABLED

[ZStriker19]

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:

releasenotes/notes/add_DD_TRACE_RUNTIME_ID_ENABLED-8e9d518dfd0028f2.yaml  @DataDog/apm-python
ddtrace/settings/_config.py                                             @DataDog/apm-core-python
docs/configuration.rst                                                  @DataDog/python-guild
tests/runtime/test_runtime_metrics_api.py                               @DataDog/apm-sdk-api-python

[github-actions]

Bootstrap import analysis

Comparison of import times between this PR and base.

Summary

The average import time from this PR is: 276 ± 3 ms.

The average import time from base is: 278 ± 4 ms.

The import time difference between this PR and base is: -2.0 ± 0.2 ms.

Import time breakdown

The following import paths have shrunk:

ddtrace.auto 2.012 ms (0.73%)

ddtrace.bootstrap.sitecustomize 1.334 ms (0.48%)

ddtrace.bootstrap.preload 1.334 ms (0.48%)

ddtrace.internal.remoteconfig.client 0.637 ms (0.23%)

ddtrace 0.678 ms (0.25%)

ddtrace.internal._unpatched 0.024 ms (0.01%)

[pr-commenter]

Benchmarks

Benchmark execution time: 2025-06-10 17:14:23

Comparing candidate commit 2fd5a49 in PR branch zachg/add_DD_TRACE_RUNTIME_ID_ENABLED with baseline commit e7c0d74 in branch main.

Found 0 performance improvements and 2 performance regressions! Performance is the same for 554 metrics, 6 unstable metrics.

scenario:iastaspectsospath-ospathsplitdrive_aspect

• 🟥 execution_time [+355.189ns; +403.710ns] or [+9.724%; +11.053%]

scenario:telemetryaddmetric-1-gauge-metric-1-times

• 🟥 execution_time [+206.603ns; +258.247ns] or [+9.477%; +11.846%]

[brettlangdon]

one testing thought, otherwise lgtm