[Release] Bumped datadog_checks_dev version to 40.0.1

[nubtron]

What does this PR do?

Releases datadog_checks_dev version 40.0.1. It generates the release changelog, updates the package version, consumes the pending changelog fragment, and adds YubiKey-signed in-toto metadata.

Motivation

Recover from the failed 40.0.0 PyPI publication with a normal patch release. The 40.0.0 wheel uses core metadata 2.5, but the previous PyPI publisher rejected that metadata version before uploading it.

PR #24847 updated the automated PyPI publisher to a version that includes Twine 7, and PR #24853 requires Twine 7 for the manual upload path. Twine 7 accepts core metadata 2.5.

After 40.0.1 is available on PyPI, PR #24842 can raise ddev's minimum datadog-checks-dev dependency before the ddev 18.0.0 release.

Validation:

• ddev release build datadog_checks_dev
• uvx --from twine==7.0.0 twine check datadog_checks_dev/dist/*
• Confirmed wheel metadata version 2.5 and package version 40.0.1
• ddev --no-interactive test --lint datadog_checks_dev
• Verified both release commit signatures

Previous failed publication: https://github.com/DataDog/integrations-core/actions/runs/31616615979/job/94180893099

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• Add qa/required if this PR needs QA validation, or qa/skip-qa if it does not. Exactly one of the two is required.
• If you need to backport this PR to another branch, you can add the backport/<branch-name> label to the PR and it will automatically open a backport PR once this one is merged

[datadog-prod-us1-3]

 

🎉 All green!

🧪 All tests passed
❄️ No new flaky tests detected

🎯 Code Coverage (details)
• Patch Coverage: 0.00%
• Overall Coverage: 88.58% (+0.09%)

_{This comment will be updated automatically if new data arrives.
🔗 Commit SHA: 2b1b960 | Docs | Datadog PR Page | Give us feedback!}

[cit-pr-commenter-54b7da]

evalya-impact-summary

evalya impact analysis

Impact analysis: RUN-ALL — every test task will run
Trigger:         empty diff (default branch, scheduled run, or shallow-clone fallback)
Test tasks:      0 (all selected)
Publish tasks:   1 (always emitted)
Diff:            empty (no diff information)

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[dd-octo-sts]

Validation Report

All 21 validations passed.

Show details

Validation	Description	Status
agent-reqs	Verify check versions match the Agent requirements file	✅
ci	Validate CI configuration and code coverage settings	✅
codeowners	Validate every integration has a CODEOWNERS entry	✅
config	Validate default configuration files against spec.yaml	✅
dep	Verify dependency pins are consistent and Agent-compatible	✅
http	Validate integrations use the HTTP wrapper correctly	✅
imports	Validate check imports do not use deprecated modules	✅
integration-style	Validate check code style conventions	✅
jmx-metrics	Validate JMX metrics definition files and config	✅
labeler	Validate PR labeler config matches integration directories	✅
legacy-signature	Validate no integration uses the legacy Agent check signature	✅
license-headers	Validate Python files have proper license headers	✅
licenses	Validate third-party license attribution list	✅
metadata	Validate metadata.csv metric definitions	✅
models	Validate configuration data models match spec.yaml	✅
openmetrics	Validate OpenMetrics integrations disable the metric limit	✅
package	Validate Python package metadata and naming	✅
qa-label	Validate the pull request declares whether it needs QA for the next Agent release	✅
readmes	Validate README files have required sections	✅
saved-views	Validate saved view JSON file structure and fields	✅
version	Validate version consistency between package and changelog	✅

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