chore(ci): update Datadog Agent version to 7.81.0

[dd-octo-sts]

Summary

This PR updates the Datadog Agent version used for builds and testing to 7.81.0.

Details of change

• Current version: 7.80.4
• Updated version: 7.81.0
• Release: https://github.com/DataDog/datadog-agent/releases/tag/7.81.0

This PR was automatically generated by the Update Datadog Agent Version workflow.

Change Type

• Bug fix
• New feature
• Non-functional (chore, refactoring, docs)
• Performance

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Disable V3 metrics for the Agent lane

With this bump, the Agent 7.81.0 release makes metrics use the V3 intake by default. The differential Antithesis Agent lane is built from this project-wide version, but its generated datadog.yaml only sets use_v2_api_series: true, while test/antithesis/intake/src/http/datadog.rs only registers POST /api/v2/series. In that scenario the Agent sends series to /api/intake/metrics/v3/series, which the intake does not route, so the Agent context set stays empty and the differential experiment fails unless this bump also disables use_v3_api.series.enabled for that config or adds V3 route support.

Useful? React with 👍 / 👎.

[pr-commenter]

Binary Size Analysis (Agent Data Plane)

Baseline: 8d55f20 · Comparison: 9531860 · diff
Analysis Configuration: stripped binaries · Pass/Fail Threshold: +5%
Sizes: 41.59 MiB (baseline) vs 41.59 MiB (comparison)
Size Change: -8 B (-0.00%)

✅ Binary size difference within threshold

Changes by Module

Module	File Size	Symbols
anon.104b1f618a14d6d60f2ebe1b651d81f5.1.llvm.1798987074148080917	-129 B	1
anon.104b1f618a14d6d60f2ebe1b651d81f5.1.llvm.556576877758027311	+128 B	1
anon.104b1f618a14d6d60f2ebe1b651d81f5.4.llvm.1798987074148080917	-114 B	1
anon.104b1f618a14d6d60f2ebe1b651d81f5.4.llvm.556576877758027311	+113 B	1
anon.104b1f618a14d6d60f2ebe1b651d81f5.3.llvm.1798987074148080917	-108 B	1
anon.104b1f618a14d6d60f2ebe1b651d81f5.3.llvm.556576877758027311	+107 B	1
anon.104b1f618a14d6d60f2ebe1b651d81f5.0.llvm.1798987074148080917	-96 B	1
anon.104b1f618a14d6d60f2ebe1b651d81f5.0.llvm.556576877758027311	+95 B	1
anon.104b1f618a14d6d60f2ebe1b651d81f5.2.llvm.1798987074148080917	-94 B	1
anon.104b1f618a14d6d60f2ebe1b651d81f5.2.llvm.556576877758027311	+93 B	1
[Unmapped]	-3 B	1

Detailed Symbol Changes

    FILE SIZE        VM SIZE    
 --------------  -------------- 
  [NEW]    +128  [NEW]     +40    anon.104b1f618a14d6d60f2ebe1b651d81f5.1.llvm.556576877758027311
  [NEW]    +113  [NEW]     +25    anon.104b1f618a14d6d60f2ebe1b651d81f5.4.llvm.556576877758027311
  [NEW]    +107  [NEW]     +19    anon.104b1f618a14d6d60f2ebe1b651d81f5.3.llvm.556576877758027311
  [NEW]     +95  [NEW]      +7    anon.104b1f618a14d6d60f2ebe1b651d81f5.0.llvm.556576877758027311
  [NEW]     +93  [NEW]      +5    anon.104b1f618a14d6d60f2ebe1b651d81f5.2.llvm.556576877758027311
  -0.0%      -3  [ = ]       0    [Unmapped]
  [DEL]     -94  [DEL]      -5    anon.104b1f618a14d6d60f2ebe1b651d81f5.2.llvm.1798987074148080917
  [DEL]     -96  [DEL]      -7    anon.104b1f618a14d6d60f2ebe1b651d81f5.0.llvm.1798987074148080917
  [DEL]    -108  [DEL]     -19    anon.104b1f618a14d6d60f2ebe1b651d81f5.3.llvm.1798987074148080917
  [DEL]    -114  [DEL]     -25    anon.104b1f618a14d6d60f2ebe1b651d81f5.4.llvm.1798987074148080917
  [DEL]    -129  [DEL]     -40    anon.104b1f618a14d6d60f2ebe1b651d81f5.1.llvm.1798987074148080917
  -0.0%      -8  [ = ]       0    TOTAL

[pr-commenter]

Regression Detector (Agent Data Plane)

Run ID: 6205238c-7c8d-4d4b-a839-4c1c703a0642
Baseline: 8d55f203 · Comparison: 95318607 · diff

Optimization Goals: ✅ No significant changes detected

Fine details of change detection per experiment (5)

Experiments configured erratic: true are tagged (ignored) and skipped when determining which experiments regressed or improved. Experiments which are detected as erratic at runtime are tagged (erratic) to flag that the run's sample dispersion was high, but their regression / improvement signal still counts.

experiment	goal	Δ mean %	links
quality_gates_rss_dsd_ultraheavy	memory	⚪ +0.26	metrics profiles logs
quality_gates_rss_dsd_low	memory	⚪ +0.20	metrics profiles logs
quality_gates_rss_dsd_heavy	memory	⚪ +0.10	metrics profiles logs
quality_gates_rss_idle	memory	⚪ +0.05	metrics profiles logs
quality_gates_rss_dsd_medium	memory	⚪ -0.30	metrics profiles logs

Bounds Checks: ✅ Passed (5)

experiment	check	replicates	observed	links
quality_gates_rss_dsd_heavy	memory_usage	10/10	✅ 132 MiB ≤ 140 MiB	metrics profiles logs
quality_gates_rss_dsd_low	memory_usage	10/10	✅ 43.4 MiB ≤ 50 MiB	metrics profiles logs
quality_gates_rss_dsd_medium	memory_usage	10/10	✅ 64.9 MiB ≤ 75 MiB	metrics profiles logs
quality_gates_rss_dsd_ultraheavy	memory_usage	10/10	✅ 191 MiB ≤ 200 MiB	metrics profiles logs
quality_gates_rss_idle	memory_usage	10/10	✅ 29 MiB ≤ 40 MiB	metrics profiles logs

Explanation

A change is flagged as a regression when |Δ mean %| > 5.00% in the regressing direction for its optimization goal AND SMP marks the experiment as a regression (is_regression: true). Improvements use the matching criteria for the improving direction. Experiments configured erratic: true (tagged (ignored)) are skipped outright; experiments detected as erratic at runtime (tagged (erratic)) still count, since that flag describes sample dispersion rather than directional certainty. The Δ mean % cell is colored accordingly: 🟢 = improvement, 🔴 = regression, ⚪ = neutral. Reduction in CPU or memory is an improvement; reduction in ingress throughput is a regression.