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

❄️ 1 New flaky test detected

ext/mysqli/tests/ghsa-h35g-vwh6-m678-stmt-row-bit.phpt (GHSA-h35g-vwh6-m678 (mysqlnd leaks partial content of the heap - stmt row bit buffer over-read)) from php.ext.mysqli.tests (Datadog) (Fix with Cursor)

--
     [*] Sending - Malicious Stmt Response for data bitval [Extract heap through buffer over-read]: 01000001023200000203646566087068705f74657374046461746104646174610673747276616c0673747276616c0ce000c8000000fd01100000003200000303646566087068705f74657374046461746104646174610662697476616c0662697476616c0c3f004000000010211000000005000004fe00002200100000050000067465737408080808080808080805000006fe00002200
     
013- [*] Received: 0500000019010000000100000001
013+ [*] Received: 050000001901000000
     [*] Server finished
     done!

🧪 1031 Tests failed

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

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

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: 6977985e000000007e40152a368a8123
tid: 6977985e00000000
hexProcessTraceId: 7e40152a368a8123
hexProcessSpanId: 038b08308412678b
processTraceId: 9097294518336258339
processSpanId: 255306808343816075

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

View all

_{This comment will be updated automatically if new data arrives.
🔗 Commit SHA: ec704d7 | 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 62.01%. Comparing base (4df27be) to head (ec704d7).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3573      +/-   ##
==========================================
- Coverage   62.04%   62.01%   -0.04%     
==========================================
  Files         140      140              
  Lines       13312    13312              
  Branches     1762     1762              
==========================================
- Hits         8260     8255       -5     
- Misses       4262     4268       +6     
+ Partials      790      789       -1     

see 1 file with indirect coverage changes

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 4df27be...ec704d7. Read the comment docs.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[pr-commenter]

Benchmarks [ tracer ]

Benchmark execution time: 2026-01-26 17:22:50

Comparing candidate commit ec704d7 in PR branch leiyks/sidecar-threaded-fallback with baseline commit 4df27be in branch master.

Found 1 performance improvements and 6 performance regressions! Performance is the same for 187 metrics, 0 unstable metrics.

scenario:ComposerTelemetryBench/benchTelemetryParsing

• 🟩 execution_time [-1357.325ns; -442.675ns] or [-10.946%; -3.570%]

scenario:MessagePackSerializationBench/benchMessagePackSerialization

• 🟥 execution_time [+7.385µs; +8.175µs] or [+7.497%; +8.300%]

scenario:MessagePackSerializationBench/benchMessagePackSerialization-opcache

• 🟥 execution_time [+5.093µs; +7.027µs] or [+5.113%; +7.056%]

scenario:SamplingRuleMatchingBench/benchRegexMatching1

• 🟥 execution_time [+62.456ns; +122.144ns] or [+5.316%; +10.396%]

scenario:SamplingRuleMatchingBench/benchRegexMatching2

• 🟥 execution_time [+79.699ns; +151.301ns] or [+6.820%; +12.947%]

scenario:SamplingRuleMatchingBench/benchRegexMatching3

• 🟥 execution_time [+73.284ns; +119.316ns] or [+6.246%; +10.169%]

scenario:SamplingRuleMatchingBench/benchRegexMatching4

• 🟥 execution_time [+88.086ns; +147.514ns] or [+7.620%; +12.761%]

[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%]