docs: Add pre-release hardware validation step using example app AI workflow

[tylerkron]

Context

Before publishing a new Daqifi.Core release, we want a repeatable hardware validation workflow that can be run by a developer or AI agent against a real DAQiFi device.

The validation logic should live with the CLI app that owns the executable hardware-facing contract: daqifi/daqifi-core-example-app#26. This daqifi-core issue is the release-process companion: once that workflow exists, document when and how release authors should run it before publishing NuGet.

Proposed Scope

Update the daqifi-core release docs/checklist to reference the example-app AI hardware validation workflow.

Potential locations:

• README.md Publishing section
• a new docs/RELEASE_CHECKLIST.md
• release workflow notes near .github/workflows/release.yml

The release note should make clear that:

• Normal CI remains dotnet build and dotnet test
• Hardware validation is a manual/pre-release confidence step, because it requires a real DAQiFi device
• The example app should be run against local daqifi-core sources using DaqifiCoreProjectPath
• The CLI exit codes and explicit thresholds are the pass/fail source of truth
• AI/Codex can orchestrate the workflow, collect artifacts, and summarize results

Acceptance Criteria

• daqifi-core release docs include a pre-release hardware validation step
• Docs link to feat: Add AI hardware-validation skill for release testing with real DAQiFi devices daqifi-core-example-app#26 or the final workflow doc/skill created by that ticket
• Docs explain that hardware validation requires configured real hardware and is not part of default GitHub-hosted CI
• Docs show the local-core validation pattern using -p:DaqifiCoreProjectPath=src/Daqifi.Core/Daqifi.Core.csproj
• Docs state that pass/fail is based on CLI exit codes and validation thresholds, not AI judgment alone

Related

• Primary workflow ticket: feat: Add AI hardware-validation skill for release testing with real DAQiFi devices daqifi-core-example-app#26
• Existing firmware-specific HIL script ticket: feat: Add hardware-in-the-loop firmware update validation script daqifi-core-example-app#8