top level span events support

[quinna-h]

• make a check to the agent /info endpoint as to whether top-level span events are supported
• if it is, modify the span class to add top-level span event
• add a new encoder and writer

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:

ddtrace/internal/_encoding.pyi                                          @DataDog/apm-core-python
ddtrace/internal/_encoding.pyx                                          @DataDog/apm-core-python
ddtrace/internal/encoding.py                                            @DataDog/apm-core-python
ddtrace/internal/writer/writer.py                                       @DataDog/apm-core-python
ddtrace/internal/writer/writer_client.py                                @DataDog/apm-core-python

[pr-commenter]

Benchmarks

Benchmark execution time: 2025-02-26 16:10:52

Comparing candidate commit 00c160d in PR branch quinna.halim/top-level-span-events-support with baseline commit 10fd73f in branch main.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 418 metrics, 2 unstable metrics.

[datadog-dd-trace-py-rkomorn]

Datadog Report

Branch report: quinna.halim/top-level-span-events-support
Commit report: 00c160d
Test service: dd-trace-py

✅ 0 Failed, 43 Passed, 460 Skipped, 51.83s Total duration (8m 12.01s time saved)