refactor: update JSON parsing to ensure type safety for ID fields in models

lib/features/company/models/company_model.dart

@@ -35,9 +35,9 @@ class CompanyModel extends Equatable {
 
   factory CompanyModel.fromJson(Map<String, dynamic> json) {
     return CompanyModel(
-      id: json['id'],
+      id: json['id'] as String,
       createdAt: DateTime.parse(json['created_at']),
-      userId: json['user_id'],
+      userId: json['user_id'] as String,
       ragioneSociale: json['ragione_sociale'],
       indirizzo: json['indirizzo'],
       cap: json['cap'],