Add asset validation docs page

[richturner]

No description provided.

[Copilot]

Pull request overview

Adds a new Architecture documentation page describing asset validation, and reorders the Architecture docs sidebar positions to accommodate the new page.

Changes:

• Add docs/architecture/asset-validation.md documenting the asset type model and constraint validation flow.
• Update sidebar_position values across existing Architecture docs to insert the new page in the desired order.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
docs/architecture/security.md	Adjust sidebar ordering to account for the new Asset Validation page.
docs/architecture/manager-endpoints-and-file-paths.md	Adjust sidebar ordering to account for the new Asset Validation page.
docs/architecture/esp32-device.md	Adjust sidebar ordering to account for the new Asset Validation page.
docs/architecture/asset-validation.md	New documentation page describing asset validation model/flow and constraint sources.
docs/architecture/asset-location-tracking.md	Adjust sidebar ordering to account for the new Asset Validation page.
docs/architecture/apps-and-consoles.md	Adjust sidebar ordering to account for the new Asset Validation page.

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[richturner]

Thanks for initial feedback. Ready for review @wborn

[wborn]

Please fix the build issues.