fix(tracer): add extra service names for all spans [backport 3.10]

[github-actions]

Backport ab14f5c from #13922 to 3.10.

Add extra service names for all finished spans.

From a suggestion of @brettlangdon

APPSEC-58108

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/report_extra_service_names_from_spans-b98b87fbefe97337.yaml  @DataDog/apm-python
ddtrace/_trace/processor/__init__.py                                    @DataDog/apm-sdk-api-python
tests/internal/service_name/test_extra_services_names.py                @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: 276 ± 4 ms.

The average import time from base is: 283 ± 5 ms.

The import time difference between this PR and base is: -6.7 ± 0.2 ms.

Import time breakdown

The following import paths have shrunk:

ddtrace.auto 3.364 ms (1.22%)

ddtrace.bootstrap.sitecustomize 2.329 ms (0.84%)

ddtrace.bootstrap.preload 1.930 ms (0.70%)

ddtrace.internal.remoteconfig.client 0.751 ms (0.27%)

multiprocessing.sharedctypes 0.130 ms (0.05%)

multiprocessing.heap 0.130 ms (0.05%)

mmap 0.130 ms (0.05%)

ddtrace.internal.products 0.109 ms (0.04%)

importlib.metadata 0.109 ms (0.04%)

zipfile 0.109 ms (0.04%)

zipfile._path 0.109 ms (0.04%)

ddtrace.settings.dynamic_instrumentation 0.022 ms (0.01%)

ddtrace.appsec._common_module_patches 0.163 ms (0.06%)

ddtrace.appsec._asm_request_context 0.163 ms (0.06%)

ddtrace.appsec._utils 0.163 ms (0.06%)

ddtrace._trace.trace_handlers 0.085 ms (0.03%)

ddtrace._trace._inferred_proxy 0.031 ms (0.01%)

ddtrace.propagation.http 0.031 ms (0.01%)

ddtrace.internal._tagset 0.031 ms (0.01%)

ddtrace 1.034 ms (0.37%)

ddtrace._logger 0.142 ms (0.05%)

ddtrace.internal.telemetry 0.142 ms (0.05%)

ddtrace.internal.telemetry.writer 0.104 ms (0.04%)

http.client 0.104 ms (0.04%)

email.parser 0.104 ms (0.04%)

email.feedparser 0.104 ms (0.04%)

email._policybase 0.104 ms (0.04%)

email.header 0.104 ms (0.04%)

email.charset 0.104 ms (0.04%)

ddtrace.settings._agent 0.038 ms (0.01%)

socket 0.038 ms (0.01%)

_socket 0.038 ms (0.01%)

ddtrace.settings._config 0.122 ms (0.04%)

ddtrace.internal.gitmetadata 0.122 ms (0.04%)

ddtrace.ext.ci 0.122 ms (0.04%)

ddtrace.ext.git 0.122 ms (0.04%)

tempfile 0.122 ms (0.04%)

ddtrace.internal._unpatched 0.116 ms (0.04%)

subprocess 0.082 ms (0.03%)

contextlib 0.082 ms (0.03%)

json 0.034 ms (0.01%)

json.decoder 0.034 ms (0.01%)

re 0.034 ms (0.01%)

enum 0.034 ms (0.01%)

types 0.034 ms (0.01%)

[pr-commenter]

Benchmarks

Benchmark execution time: 2025-07-10 14:57:28

Comparing candidate commit a417350 in PR branch backport-13922-to-3.10 with baseline commit 68d1e96 in branch 3.10.

Found 0 performance improvements and 2 performance regressions! Performance is the same for 536 metrics, 4 unstable metrics.

scenario:iastaspects-format_map_aspect

• 🟥 execution_time [+478.590ns; +533.033ns] or [+14.783%; +16.465%]

scenario:iastaspectsospath-ospathnormcase_aspect

• 🟥 execution_time [+331.668ns; +411.118ns] or [+9.454%; +11.719%]