Remove OTel resource attribute tag limit

[MilanGarnier]

Summary

• Remove the arbitrary 10-tag cap when mapping OTEL_RESOURCE_ATTRIBUTES. This was an undocumented gap.
• Preserve all custom resource attributes as Datadog tags.

Testing

• ./gradlew :internal-api:test --tests datadog.trace.bootstrap.config.provider.OtelEnvironmentConfigSourceTest

Related: APMAPI-2420

[datadog-prod-us1-5]

🎯 Code Coverage (details)
• Patch Coverage: 0.00%
• Overall Coverage: 59.28% (-0.01%)

_{This comment will be updated automatically if new data arrives.
🔗 Commit SHA: e25a7c1 | Docs | Give us feedback!}

[dd-octo-sts]

🟢 Java Benchmark SLOs — All performance SLOs passed

Suite	Status
Startup	🟢 pass

SLO thresholds are defined here based on automatically generated metrics. A warning is raised when results are within 5% of the threshold.

PR vs. master results

Scenario	Candidate	master	Δ (95% CI of mean)
startup:insecure-bank:iast:Agent	13.99 s	13.92 s	[-0.2%; +1.1%] (no difference)
startup:insecure-bank:tracing:Agent	12.92 s	13.03 s	[-1.4%; -0.2%] (maybe better)
startup:petclinic:appsec:Agent	17.05 s	16.87 s	[+0.4%; +1.8%] (maybe worse)
startup:petclinic:iast:Agent	17.00 s	16.99 s	[-0.8%; +0.9%] (no difference)
startup:petclinic:profiling:Agent	16.69 s	16.87 s	[-2.3%; +0.1%] (no difference)
startup:petclinic:sca:Agent	16.94 s	16.82 s	[-0.1%; +1.5%] (no difference)
startup:petclinic:tracing:Agent	16.11 s	16.13 s	[-1.0%; +0.8%] (no difference)

Commit: e25a7c18 · CI Pipeline · Benchmarking Platform UI

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Load and DaCapo benchmarks can be triggered manually in the GitLab pipeline. Results will appear in the Benchmarking Platform UI after completion.

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-05T08:44:35.422312Z	e25a7c1	Draft marked ready
🔒 Security Review	✅ Completed 2026-10-05T08:45:21.879307Z	e25a7c1	Draft marked ready

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[datadog-prod-us1-5]

Resource attributes beyond the former ten-entry limit now participate in Datadog tag parsing, where a later value containing spaces clears the entire tag map and drops valid preceding tags.

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_{🤖 Bits Code Review · Commit e25a7c1 · @DataDog review to ask questions}

[dd-octo-sts]

/merge

[gh-worker-devflow-routing-ef8351]

View all feedbacks in Devflow UI.

2026-10-05 11:30:37 UTC ℹ️ Start processing command /merge

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2026-10-05 11:30:41 UTC ℹ️ MergeQueue: pull request added to the queue

The expected merge time in master is approximately 1h (p90).

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2026-10-05 12:43:42 UTC ℹ️ MergeQueue: This merge request was merged