docs(website): document ResourceNotAvailable handling and command policy guidance

[devinjameson]

Motivation

• Clarify handling of brief timing windows between acquire/release transitions and command execution by documenting ResourceNotAvailable as an explicit safety signal and advising where to implement retry/fallback policies.

Description

• Add a paragraph to packages/website/src/page/architectureAndConcepts.ts explaining that ResourceNotAvailable should be treated as the explicit safety signal for those windows and that command policy should be decided in Effect (for example returning a fallback message, retrying with backoff, or ignoring the command).

Testing

• No automated tests were modified or run for this documentation-only change.

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Codex Task

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1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
foldkit-website	Ignored		Mar 2, 2026 4:49pm