[FEAT] Connettori Discovery — UI gestione per org (Fase 4)

Pagina connettori-discovery.html + connettori-discovery.js (DiscoveryUI): lista
connettori, crea (mostra la chiave API una sola volta + comando agente), dettaglio
con storico run, rigenera chiave, elimina. Solo org_admin.
- Voce sidebar V2 "Connettori Discovery" in Operativo (common-bi.js, data-nav auto).
- api.js: metodi list/create/get/update/delete/rotateDiscoveryKey.
- ARIA navigationMapBlock: aggiunta la voce (coerenza assistente↔menu).
- help.js: _pageMap + guida contestuale "Connettori Discovery" (multi-connettore,
  come funziona, sicurezza scope ingest:assets).
Smoke: pagina 200, /api/discovery-connectors/list 401 (auth). Cache-buster
common-bi/help/api -> 20260625d.

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

public/js/common-bi.js

@@ -91,6 +91,7 @@
                 items: [
                     { name: 'Formazione',     href: 'training.html', icon: iconAcademicCap(), i18nKey: 'nav.training' },
                     { name: 'Inventario',     href: 'assets.html',   icon: iconServer(),      i18nKey: 'nav.assets' },
+                    { name: 'Connettori Discovery', href: 'connettori-discovery.html', icon: '<svg viewBox="0 0 20 20" fill="currentColor"><path d="M11 3a1 1 0 100 2h2.586l-6.293 6.293a1 1 0 101.414 1.414L15 6.414V9a1 1 0 102 0V4a1 1 0 00-1-1h-5z"/><path d="M5 5a2 2 0 00-2 2v8a2 2 0 002 2h8a2 2 0 002-2v-3a1 1 0 10-2 0v3H5V7h3a1 1 0 000-2H5z"/></svg>' },
                     { name: 'Audit interni', href: 'internal-audits.html', icon: `<svg viewBox="0 0 20 20" fill="currentColor"><path fill-rule="evenodd" d="M4 4a2 2 0 012-2h4.586A2 2 0 0112 2.586L15.414 6A2 2 0 0116 7.414V16a2 2 0 01-2 2H6a2 2 0 01-2-2V4zm5.707 6.707a1 1 0 00-1.414-1.414L7 10.586l-.293-.293a1 1 0 00-1.414 1.414l1 1a1 1 0 001.414 0l2-2zM10 13a1 1 0 100 2h3a1 1 0 100-2h-3z" clip-rule="evenodd"/></svg>`, i18nKey: 'nav.internal_audits' },
                     { name: 'Controlli periodici', href: 'controlli-periodici.html', icon: `<svg viewBox="0 0 20 20" fill="currentColor"><path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm1-12a1 1 0 10-2 0v4a1 1 0 00.293.707l2.5 2.5a1 1 0 001.414-1.414L11 9.586V6z" clip-rule="evenodd"/></svg>`, i18nKey: 'nav.periodic_controls' },
                     { name: 'Riesame di Direzione', href: 'management-review.html', icon: `<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M9 11l3 3L22 4"/><path d="M21 12v7a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h11"/></svg>`, i18nKey: 'nav.management_review' },