chore(tracing): move mini agent out of tracing

[mabdinur]

Description

No idea where we should put starting the mini-agent but doing it in tracer initialization feels wrong. The mini agent should only be started once (at most).

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/__init__.py                                                     @DataDog/apm-core-python
ddtrace/_trace/tracer.py                                                @DataDog/apm-sdk-api-python

[pr-commenter]

Benchmarks

Benchmark execution time: 2024-12-20 19:19:52

Comparing candidate commit fdbbf46 in PR branch munir/move-mini-agent-start-from-trace-init with baseline commit 3d08709 in branch main.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 394 metrics, 2 unstable metrics.

[datadog-dd-trace-py-rkomorn]

Datadog Report

Branch report: munir/move-mini-agent-start-from-trace-init
Commit report: fdbbf46
Test service: dd-trace-py

✅ 0 Failed, 98 Passed, 1370 Skipped, 1m 34.55s Total duration (34m 18.42s time saved)

[erikayasuda]

I think we should have a follow up convo with serverless, but for now LGTM!