litellm full instrumentation poc

[ncybul]

No description provided.

[github-actions]

CODEOWNERS have been resolved as:

releasenotes/notes/litellm-proxy-tracing-920209d5d51a231b.yaml          @DataDog/apm-python
tests/snapshots/tests.contrib.litellm.test_litellm.test_litellm_route_request.json  @DataDog/apm-python
ddtrace/contrib/_litellm.py                                             @DataDog/apm-core-python @DataDog/apm-idm-python
ddtrace/contrib/internal/litellm/patch.py                               @DataDog/apm-core-python @DataDog/apm-idm-python
ddtrace/llmobs/_integrations/litellm.py                                 @DataDog/ml-observability
ddtrace/llmobs/_integrations/utils.py                                   @DataDog/ml-observability
riotfile.py                                                             @DataDog/apm-python
tests/contrib/litellm/test_litellm.py                                   @DataDog/apm-core-python @DataDog/apm-idm-python
.riot/requirements/143130b.txt                                          @DataDog/apm-python
.riot/requirements/3bb416c.txt                                          @DataDog/apm-python
.riot/requirements/6770e54.txt                                          @DataDog/apm-python
.riot/requirements/739c736.txt                                          @DataDog/apm-python
.riot/requirements/d016adf.txt                                          @DataDog/apm-python

[github-actions]

Bootstrap import analysis

Comparison of import times between this PR and base.

Summary

The average import time from this PR is: 232 ± 2 ms.

The average import time from base is: 233 ± 2 ms.

The import time difference between this PR and base is: -1.4 ± 0.1 ms.

Import time breakdown

The following import paths have shrunk:

ddtrace.auto 1.858 ms (0.80%)

ddtrace.bootstrap.sitecustomize 1.190 ms (0.51%)

ddtrace.bootstrap.preload 1.190 ms (0.51%)

ddtrace.internal.remoteconfig.client 0.609 ms (0.26%)

ddtrace 0.667 ms (0.29%)

[pr-commenter]

Benchmarks

Benchmark execution time: 2025-05-13 20:21:12

Comparing candidate commit 8079ce5 in PR branch nicole-cybul/litellm-poc with baseline commit 690973d in branch main.

Found 0 performance improvements and 1 performance regressions! Performance is the same for 526 metrics, 9 unstable metrics.

scenario:iast_aspects-translate_aspect

• 🟥 execution_time [+251.497ns; +302.563ns] or [+7.427%; +8.935%]