[DOCS] Help online: sezione Classificazione NIS2 aggiornata ad A2 (autovalutazione preliminare, size-independent art.3 c.5, criteri c.9 b/c/d, D.Lgs. non Direttiva) + bump ?v help.js. KB AI: ingestato doc aggiornamenti A1/A2/A3 (scope SYSTEM)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

public/architecture.html

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+    <script src="js/help.js?v=20260616"></script>
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