[FIX] Simulator + ServicesController: allineamento a schema DB reale

simulate-nis2.php:
- sector: ict → ict_services, healthcare → health (enum DB corretto)
- employee_count (non employees_count) per OrganizationController

ServicesController::provision():
- INSERT organizations: rimossi campi non esistenti (legal_form, ateco_code, etc.)
- Usa colonne reali: name, vat_number, employee_count, sector, entity_type, is_active
- entity_type: voluntary → not_applicable (enum non supporta voluntary)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

simulate-nis2.php

@@ -426,7 +426,7 @@ $COMPANIES = [
         'ateco_desc'     => 'Produzione di software non connesso all\'edizione',
         'employees'      => 320,
         'annual_turnover'=> 18500000,
-        'sector'         => 'ict',
+        'sector'         => 'ict_services',
         'nis2_type'      => 'essential',
         'city'           => 'Milano',
         'province'       => 'MI',
@@ -468,7 +468,7 @@ $COMPANIES = [
         'ateco_desc'     => 'Servizi ospedalieri',
         'employees'      => 750,
         'annual_turnover'=> 42000000,
-        'sector'         => 'healthcare',
+        'sector'         => 'health',
         'nis2_type'      => 'important',
         'city'           => 'Roma',
         'province'       => 'RM',
@@ -644,7 +644,7 @@ foreach ($COMPANIES as $slug => $comp) {
         'vat_number'       => $comp['vat_number'],
         'ateco_code'       => $comp['ateco_code'],
         'sector'           => $comp['sector'],
-        'employees_count'  => $comp['employees'],
+        'employee_count'   => $comp['employees'],
         'annual_turnover_eur' => $comp['annual_turnover'],
         'city'             => $comp['city'],
         'province'         => $comp['province'],