feat(tracer): add configuration for connection mode

[Leiyks]

Description

Reviewer checklist

• Test coverage seems ok.
• Appropriate labels assigned.

[datadog-official]

⚠️ Tests

✨ Fix all issues with Cursor

⚠️ Warnings

🧪 1022 Tests failed

    testSearchPhpBinaries from integration.DDTrace\Tests\Integration\PHPInstallerTest (Fix with Cursor)

testSimplePushAndProcess from laravel-58-test.DDTrace\Tests\Integrations\Laravel\V5_8\QueueTest (Datadog) (Fix with Cursor)

DDTrace\Tests\Integrations\Laravel\V5_8\QueueTest::testSimplePushAndProcess
Test code or tested code printed unexpected output: spanLinksTraceId: 696a5ab2000000004800389f71762699
tid: 696a5ab200000000
hexProcessTraceId: 4800389f71762699
hexProcessSpanId: 31e4b451807bdb01
processTraceId: 5188209028185335449
processSpanId: 3595196664689449729

phpvfscomposer://tests/vendor/phpunit/phpunit/phpunit:106

testSimplePushAndProcess from laravel-8x-test.DDTrace\Tests\Integrations\Laravel\V8_x\QueueTest (Datadog) (Fix with Cursor)

DDTrace\Tests\Integrations\Laravel\V8_x\QueueTest::testSimplePushAndProcess
Test code or tested code printed unexpected output: spanLinksTraceId: 696a5ae800000000dd8f06b838583ba9
tid: 696a5ae800000000
hexProcessTraceId: dd8f06b838583ba9
hexProcessSpanId: d39c2e99e1867aa9
processTraceId: 15964986592340753321
processSpanId: 15248113676818217641

View all

ℹ️ Info

❄️ No new flaky tests detected

_{This comment will be updated automatically if new data arrives.
🔗 Commit SHA: cda73e8 | Docs | Datadog PR Page | Was this helpful? Give us feedback!}

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 62.02%. Comparing base (323b5e1) to head (cda73e8).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3573      +/-   ##
==========================================
+ Coverage   61.93%   62.02%   +0.09%     
==========================================
  Files         140      140              
  Lines       13309    13309              
  Branches     1762     1762              
==========================================
+ Hits         8243     8255      +12     
+ Misses       4275     4265      -10     
+ Partials      791      789       -2     

see 2 files with indirect coverage changes

---

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[pr-commenter]

Benchmarks [ tracer ]

Benchmark execution time: 2026-01-16 16:30:59

Comparing candidate commit cda73e8 in PR branch leiyks/sidecar-threaded-fallback with baseline commit 323b5e1 in branch master.

Found 1 performance improvements and 0 performance regressions! Performance is the same for 193 metrics, 0 unstable metrics.

scenario:MessagePackSerializationBench/benchMessagePackSerialization

• 🟩 execution_time [-4.773µs; -2.987µs] or [-4.356%; -2.726%]

[pr-commenter]

Benchmarks [ profiler ]

Benchmark execution time: 2026-01-14 16:24:26

Comparing candidate commit 05ebcae in PR branch leiyks/sidecar-threaded-fallback with baseline commit 88a859c in branch master.

Found 0 performance improvements and 2 performance regressions! Performance is the same for 28 metrics, 6 unstable metrics.

scenario:php-profiler-timeline-memory-with-profiler-and-timeline

• 🟥 cpu_user_time [+36.124ms; +78.620ms] or [+2.324%; +5.058%]
• 🟥 execution_time [+32.293ms; +51.335ms] or [+2.645%; +4.204%]