lazy load telemetry entrypoint only when needed

[rochdev]

What does this PR do?

Lazy load telemetry entrypoint only when needed.

Motivation

Right now when telemetry is disabled, the code is still loaded which impacts startup time.

Additional Notes

For now I only handled the entrypoint, but there are also modules using the internals directly which will be addressed in another PR.

[github-actions]

Overall package size

Self size: 8.77 MB
Deduped: 94.97 MB
No deduping: 95.49 MB

Dependency sizes

| name | version | self size | total size | |------|---------|-----------|------------| | @datadog/libdatadog | 0.4.0 | 29.44 MB | 29.44 MB | | @datadog/native-appsec | 8.4.0 | 19.25 MB | 19.26 MB | | @datadog/native-iast-taint-tracking | 3.3.0 | 13.77 MB | 13.78 MB | | @datadog/pprof | 5.5.1 | 9.79 MB | 10.17 MB | | protobufjs | 7.2.5 | 2.77 MB | 5.16 MB | | @datadog/native-iast-rewriter | 2.8.0 | 2.6 MB | 2.74 MB | | @opentelemetry/core | 1.14.0 | 872.87 kB | 1.47 MB | | @datadog/native-metrics | 3.1.0 | 1.06 MB | 1.46 MB | | @opentelemetry/api | 1.8.0 | 1.21 MB | 1.21 MB | | import-in-the-middle | 1.11.2 | 112.74 kB | 835.4 kB | | source-map | 0.7.4 | 226 kB | 226 kB | | opentracing | 0.14.7 | 194.81 kB | 194.81 kB | | lru-cache | 7.18.3 | 133.92 kB | 133.92 kB | | pprof-format | 2.1.0 | 111.69 kB | 111.69 kB | | @datadog/sketches-js | 2.1.0 | 109.9 kB | 109.9 kB | | lodash.sortby | 4.7.0 | 75.76 kB | 75.76 kB | | ignore | 5.3.2 | 53.63 kB | 53.63 kB | | shell-quote | 1.8.1 | 44.96 kB | 44.96 kB | | istanbul-lib-coverage | 3.2.0 | 29.34 kB | 29.34 kB | | rfdc | 1.3.1 | 25.21 kB | 25.21 kB | | @isaacs/ttlcache | 1.4.1 | 25.2 kB | 25.2 kB | | tlhunter-sorted-set | 0.1.0 | 24.94 kB | 24.94 kB | | limiter | 1.1.5 | 23.17 kB | 23.17 kB | | dc-polyfill | 0.1.4 | 23.1 kB | 23.1 kB | | retry | 0.13.1 | 18.85 kB | 18.85 kB | | semifies | 1.0.0 | 15.84 kB | 15.84 kB | | jest-docblock | 29.7.0 | 8.99 kB | 12.76 kB | | crypto-randomuuid | 1.0.0 | 11.18 kB | 11.18 kB | | ttl-set | 1.0.0 | 4.61 kB | 9.69 kB | | path-to-regexp | 0.1.12 | 6.6 kB | 6.6 kB | | koalas | 1.0.2 | 6.47 kB | 6.47 kB | | module-details-from-path | 1.0.3 | 4.47 kB | 4.47 kB |

_{🤖 This report was automatically generated by heaviest-objects-in-the-universe}

[codecov]

Codecov Report

Attention: Patch coverage is 93.06358% with 12 lines in your changes missing coverage. Please review.

Project coverage is 80.95%. Comparing base (c894085) to head (c902c9a).
Report is 6 commits behind head on master.

Files with missing lines	Patch %	Lines
packages/dd-trace/src/telemetry/telemetry.js	92.77%	12 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #5258   +/-   ##
=======================================
  Coverage   80.94%   80.95%           
=======================================
  Files         488      489    +1     
  Lines       21849    21858    +9     
=======================================
+ Hits        17686    17695    +9     
  Misses       4163     4163           

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[datadog-datadog-prod-us1]

Datadog Report

Branch report: lazy-telemetry-root
Commit report: 8c7c551
Test service: dd-trace-js-integration-tests

✅ 0 Failed, 668 Passed, 0 Skipped, 13m 26.51s Total Time

[pr-commenter]

Benchmarks

Benchmark execution time: 2025-02-24 20:51:18

Comparing candidate commit c902c9a in PR branch lazy-telemetry-root with baseline commit c894085 in branch master.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 922 metrics, 11 unstable metrics.

[BridgeAR]

LGTM % comments

[BridgeAR]

LGTM