feat(trace_exporter): enable telemetry in stats exporter

[VianneyRuhlmann]

What does this PR do?

Enable sending telemetry and health metrics from the stats exporter.

Motivation

What inspired you to submit this pull request?

Additional Notes

Anything else we should know when reviewing?

How to test the change?

Describe here in detail how the change can be validated.

[VianneyRuhlmann]

• feat(sidecar): enable telemetry for stats #2175
• feat(trace_exporter): enable telemetry in stats exporter #2160 👈 (View in Graphite)
• feat(stats)!: send telemetry for cardinality limits #2159
• feat(stats)!: add whole key cardinality limit #2158
• main

This stack of pull requests is managed by Graphite. Learn more about stacking.

[datadog-datadog-prod-us1-2]

🎉 All green!

🧪 All tests passed
❄️ No new flaky tests detected

🎯 Code Coverage (details)
• Patch Coverage: 72.34%
• Overall Coverage: 74.39% (-0.05%)

_{This comment will be updated automatically if new data arrives.
🔗 Commit SHA: 06d7629 | Docs | Datadog PR Page | Give us feedback!}

[github-actions]

Clippy Allow Annotation Report

Comparing clippy allow annotations between branches:

• Base Branch: origin/main
• PR Branch: origin/06-24-feat_trace_exporter_enable_telemetry_in_stats_exporter

Summary by Rule

Rule	Base Branch	PR Branch	Change
unwrap_used	3	3	No change (0%)
Total	3	3	No change (0%)

Annotation Counts by File

File	Base Branch	PR Branch	Change
libdd-data-pipeline/src/telemetry/mod.rs	1	1	No change (0%)
libdd-data-pipeline/src/trace_exporter/mod.rs	2	2	No change (0%)

Annotation Stats by Crate

Crate	Base Branch	PR Branch	Change
clippy-annotation-reporter	5	5	No change (0%)
datadog-ffe-ffi	1	1	No change (0%)
datadog-ipc	22	22	No change (0%)
datadog-live-debugger	4	4	No change (0%)
datadog-live-debugger-ffi	10	10	No change (0%)
datadog-profiling-replayer	4	4	No change (0%)
datadog-sidecar	45	45	No change (0%)
libdd-common	13	13	No change (0%)
libdd-common-ffi	12	12	No change (0%)
libdd-data-pipeline	6	6	No change (0%)
libdd-ddsketch	2	2	No change (0%)
libdd-dogstatsd-client	1	1	No change (0%)
libdd-profiling	13	13	No change (0%)
libdd-remote-config	3	3	No change (0%)
libdd-telemetry	20	20	No change (0%)
libdd-tinybytes	4	4	No change (0%)
libdd-trace-normalization	2	2	No change (0%)
libdd-trace-obfuscation	3	3	No change (0%)
libdd-trace-stats	1	1	No change (0%)
libdd-trace-utils	11	11	No change (0%)
Total	182	182	No change (0%)

About This Report

This report tracks Clippy allow annotations for specific rules, showing how they've changed in this PR. Decreasing the number of these annotations generally improves code quality.

[chatgpt-codex-connector]

💡 Codex Review

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[ajgajg1134]

This looks good to me but I'm definitely not an expert in this area (yet? 😛)

[dd-octo-sts]

Artifact Size Benchmark Report

aarch64-alpine-linux-musl

Artifact	Baseline	Commit	Change
/aarch64-alpine-linux-musl/lib/libdatadog_profiling.so	7.88 MB	7.88 MB	0% (0 B) 👌
/aarch64-alpine-linux-musl/lib/libdatadog_profiling.a	85.64 MB	85.67 MB	+.02% (+24.65 KB) 🔍

aarch64-unknown-linux-gnu

Artifact	Baseline	Commit	Change
/aarch64-unknown-linux-gnu/lib/libdatadog_profiling.so	10.60 MB	10.60 MB	+0% (+480 B) 👌
/aarch64-unknown-linux-gnu/lib/libdatadog_profiling.a	96.81 MB	96.83 MB	+.02% (+25.50 KB) 🔍

libdatadog-x64-windows

Artifact	Baseline	Commit	Change
/libdatadog-x64-windows/debug/dynamic/datadog_profiling_ffi.dll	25.41 MB	25.42 MB	+.02% (+5.50 KB) 🔍
/libdatadog-x64-windows/debug/dynamic/datadog_profiling_ffi.lib	88.04 KB	88.44 KB	+.45% (+410 B) 🔍
/libdatadog-x64-windows/debug/dynamic/datadog_profiling_ffi.pdb	184.51 MB	184.54 MB	+.01% (+32.00 KB) 🔍
/libdatadog-x64-windows/debug/static/datadog_profiling_ffi.lib	945.48 MB	946.63 MB	+.12% (+1.15 MB) 🔍
/libdatadog-x64-windows/release/dynamic/datadog_profiling_ffi.dll	8.29 MB	8.30 MB	+.02% (+2.50 KB) 🔍
/libdatadog-x64-windows/release/dynamic/datadog_profiling_ffi.lib	88.04 KB	88.44 KB	+.45% (+410 B) 🔍
/libdatadog-x64-windows/release/dynamic/datadog_profiling_ffi.pdb	24.52 MB	24.53 MB	+.03% (+8.00 KB) 🔍
/libdatadog-x64-windows/release/static/datadog_profiling_ffi.lib	48.85 MB	48.86 MB	+.03% (+15.86 KB) 🔍

libdatadog-x86-windows

Artifact	Baseline	Commit	Change
/libdatadog-x86-windows/debug/dynamic/datadog_profiling_ffi.dll	22.02 MB	22.02 MB	+.01% (+4.50 KB) 🔍
/libdatadog-x86-windows/debug/dynamic/datadog_profiling_ffi.lib	89.42 KB	89.82 KB	+.45% (+414 B) 🔍
/libdatadog-x86-windows/debug/dynamic/datadog_profiling_ffi.pdb	188.52 MB	188.56 MB	+.02% (+40.00 KB) 🔍
/libdatadog-x86-windows/debug/static/datadog_profiling_ffi.lib	932.67 MB	933.84 MB	+.12% (+1.16 MB) 🔍
/libdatadog-x86-windows/release/dynamic/datadog_profiling_ffi.dll	6.41 MB	6.41 MB	+.02% (+1.50 KB) 🔍
/libdatadog-x86-windows/release/dynamic/datadog_profiling_ffi.lib	89.42 KB	89.82 KB	+.45% (+414 B) 🔍
/libdatadog-x86-windows/release/dynamic/datadog_profiling_ffi.pdb	26.32 MB	26.33 MB	+.02% (+8.00 KB) 🔍
/libdatadog-x86-windows/release/static/datadog_profiling_ffi.lib	46.48 MB	46.49 MB	+.03% (+14.47 KB) 🔍

x86_64-alpine-linux-musl

Artifact	Baseline	Commit	Change
/x86_64-alpine-linux-musl/lib/libdatadog_profiling.a	76.38 MB	76.40 MB	+.02% (+22.79 KB) 🔍
/x86_64-alpine-linux-musl/lib/libdatadog_profiling.so	8.76 MB	8.76 MB	+.04% (+4.00 KB) 🔍

x86_64-unknown-linux-gnu

Artifact	Baseline	Commit	Change
/x86_64-unknown-linux-gnu/lib/libdatadog_profiling.a	91.86 MB	91.88 MB	+.02% (+23.08 KB) 🔍
/x86_64-unknown-linux-gnu/lib/libdatadog_profiling.so	10.66 MB	10.66 MB	+.03% (+4.35 KB) 🔍

[gh-worker-devflow-routing-ef8351]

View all feedbacks in Devflow UI.

2026-06-30 18:04:40 UTC ℹ️ Start processing command devflow:merge

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2026-06-30 18:04:47 UTC ℹ️ MergeQueue: waiting for PR to be ready

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It will be added to the queue as soon as checks pass and/or get approvals. View in MergeQueue UI.
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2026-06-30 22:08:11 UTC ⚠️ MergeQueue: This merge request was unqueued

devflow unqueued this merge request: It did not become mergeable within the expected time

[gh-worker-devflow-routing-ef8351]

View all feedbacks in Devflow UI.

2026-07-03 12:18:13 UTC ℹ️ Start processing command devflow:merge

---

2026-07-03 12:18:18 UTC ℹ️ MergeQueue: pull request added to the queue

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

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2026-07-03 13:04:01 UTC ℹ️ MergeQueue: This merge request was merged