⚙️ [Maintenance]: Hard-lock Pester test dependency to 5.8.0 by GUID

[Marius Storhaug (MariusStorhaug)]

Re-establishes a hard-locked Pester test dependency for PSCustomObject, consistent with the other module repos. The pin was previously removed in #16 (which closed #15) to unblock CI; this restores it as an exact, GUID-pinned dependency per the agreed hard-lock strategy.

#Requires -Modules @{ ModuleName = 'Pester'; RequiredVersion = '5.8.0'; GUID = 'a699dea5-2c73-4616-a270-1f7abb777e71' }

Why 5.8.0 + GUID

• Exact version = reproducible and supply-chain-safe (no silent drift to a newer or compromised release).
• GUID pins module identity (anti-name-squat). Both the version and the GUID are enforced by PowerShell at discovery time (verified locally).
• No version comment — unlike a GitHub Actions @<sha>, RequiredVersion already states the version in plain text, and #Requires rejects a GUID without a version key.

Context: #15, #16. Part of the dependency-management epic PSModule/Process-PSModule#356.

Note

This pin fully holds once Invoke-Pester installs the pinned version instead of the latest (today it installs newest, so a future Pester release would re-break exact pins). Tracked in PSModule/Invoke-Pester#68.

[github-actions]

No Significant Changes Detected

This PR does not contain changes to files that would trigger a new release:

Pattern	Description
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^README\.md$	Matches files where path matches this pattern

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[Copilot]

Pull request overview

This PR reintroduces a #Requires -Modules directive in the test entrypoint to enforce a specific Pester dependency (version + GUID) for reproducible test execution.

Changes:

• Adds #Requires -Modules to tests/PSCustomObject.Tests.ps1 pinning Pester to 5.8.0 and a specific module GUID.
• Shifts the test file header so the #Requires directive is evaluated before any test code/attributes.

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[github-actions]

Super-linter summary

Language	Validation result
CHECKOV	Pass ✅
GITHUB_ACTIONS	Pass ✅
GITLEAKS	Pass ✅
GIT_MERGE_CONFLICT_MARKERS	Pass ✅
MARKDOWN	Pass ✅
NATURAL_LANGUAGE	Pass ✅
POWERSHELL	Pass ✅
PRE_COMMIT	Pass ✅
SPELL_CODESPELL	Pass ✅
TRIVY	Pass ✅
YAML	Pass ✅

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