Prepare release 3.6.0

[jsoriano]

Prepare release 3.6.0, fixes #1060.

[jsoriano]

Change intended for idempotent testing.
Without these changes the test cannot be run twice in the same deployment, as package upgrade fails to remove the existing internal resources.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 2e5b2de7-12df-44b9-ac5c-010d3824f3f0

📥 Commits

Reviewing files that changed from the base of the PR and between 12bf990 and 9f0164d.

📒 Files selected for processing (2)

• compliance/compliance_test.go
• compliance/features/basic.feature

🚧 Files skipped from review as they are similar to previous changes (1)

• compliance/features/basic.feature

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📝 Walkthrough

Walkthrough

This PR updates CI and compliance testing for the 9.4.0 stack and advances in-development spec/version bookkeeping to 3.7.0-next. It replaces SLO instance checks with SLO template validation, adds an Elasticsearch transform-alias verifier and a content-package dependency checker, and implements corresponding Kibana API helpers. Test data and package assets (dashboards, lenses, maps, searches, ML model IDs, SLO template JSON) were updated; transform destination indices were changed from dot-prefixed (hidden) names to non-dot names. Documentation in AGENTS.md was expanded and temporary PSR00001 exclusion workarounds were removed.

🚥 Pre-merge checks | ✅ 2

✅ Passed checks (2 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	PR fulfills the coding requirements from issue #1060: implements SLO templates [#1083,#1084], updates compliance tests with version 9.4.0/3.6.0 [#1085], validates time_series index mode, handles transform aliases, and removes PSR00001 exclusions to resolve blocking issues.
Out of Scope Changes check	✅ Passed	All changes directly support the 3.6.0 release: compliance test updates, SLO template migration, transform alias validation, field corrections (timeseries→event.duration), and removal of outdated validation exclusions. No unrelated modifications detected.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

• 🛠️ Update Documentation: Commit on current branch
• 🛠️ Update Documentation: Create PR

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[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: 9f0164d

History

• 💚 Build #2008 succeeded 12bf990
• 💔 Build #2006 failed 85a6421
• 💔 Build #2003 failed 4e166d3

cc @jsoriano