feat(sync): add company details to customer addresses

Addresses with a company are completed through
GET /customers_addresses/:id (tax number, company number, legal status),
which the customer payload does not embed. Addresses without company get
these fields set to null; a failed call keeps the stored values.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

prisma/schema.prisma

@@ -151,19 +151,25 @@ model CustomerAddress {
   id        String   @id @default(uuid())
   updatedAt DateTime @updatedAt
 
-  address    String
-  city       String
-  company    String?
-  country    String
-  firstName  String
-  hiboutikId Int     @unique
-  isDefault  Boolean @default(false)
-  lastName   String
+  address       String
+  city          String
+  company       String?
+  /// Company registration number (SIRET...), only for an address with a company
+  companyNumber String?
+  country       String
+  firstName     String
+  hiboutikId    Int     @unique
+  isDefault     Boolean @default(false)
+  lastName      String
+  /// Company legal status (SAS, SARL...), only for an address with a company
+  legalStatus   String?
   /// Free complement (building, floor, door code...)
-  other      String?
-  phone      String?
-  state      String?
-  zipCode    String
+  other         String?
+  phone         String?
+  state         String?
+  /// Company VAT number, only for an address with a company
+  taxNumber     String?
+  zipCode       String
 
   customer   Customer @relation(fields: [customerId], references: [id], onDelete: Cascade)
   customerId String