feat(customers): enhance customer retrieval with filtering options

- Updated `findAll` method in `CustomersController` to accept filtering parameters.
- Implemented filtering logic in `CustomersService` to retrieve customers based on type and search query.
- Added `PosCustomerFilterDto` for query validation.
- Updated customer-related DTOs to make fields optional and added length validation where necessary.
- Modified customer-related logic in `sales-invoice-tsp.utils.ts` to accommodate new DTO structure.
- Added unique constraints to `customer_individuals` and `customer_legal` tables in the database migration.
- Removed commented-out code in `PosMiddleware` for cleaner codebase.
- Set default value for `is_default_guild_good` to false in `OwnedGoodsService`.

prisma/schema/shared/customers.prisma

@@ -13,33 +13,35 @@ model Customer {
 }
 
 model CustomerIndividual {
-  first_name           String           @db.VarChar(255)
-  last_name            String           @db.VarChar(255)
-  national_id          String           @db.Char(10)
-  mobile_number        String           @db.Char(15)
-  postal_code          String           @db.Char(10)
-  economic_code        String?          @db.Char(10)
+  first_name           String?          @db.VarChar(255)
+  last_name            String?          @db.VarChar(255)
+  national_id          String?          @db.Char(10)
+  mobile_number        String?          @db.Char(15)
+  postal_code          String?          @db.Char(10)
+  economic_code        String?          @db.Char(14)
   customer_id          String           @id
   business_activity_id String
   business_activity    BusinessActivity @relation(fields: [business_activity_id], references: [id])
   customer             Customer         @relation(fields: [customer_id], references: [id], onDelete: Cascade)
 
   @@unique([business_activity_id, national_id])
+  @@unique([business_activity_id, postal_code, national_id])
   @@index([business_activity_id])
   @@map("customer_individuals")
 }
 
 model CustomerLegal {
-  name                 String           @db.VarChar(255)
-  economic_code        String           @db.Char(10)
+  name                 String?          @db.VarChar(255)
+  economic_code        String?          @db.Char(11)
   registration_number  String?          @db.Char(20)
-  postal_code          String           @db.Char(10)
+  postal_code          String?          @db.Char(10)
   customer_id          String           @id
   business_activity_id String
   business_activity    BusinessActivity @relation(fields: [business_activity_id], references: [id])
   customer             Customer         @relation(fields: [customer_id], references: [id], onDelete: Cascade)
 
   @@unique([business_activity_id, economic_code])
+  @@unique([business_activity_id, postal_code, registration_number])
   @@index([business_activity_id])
   @@map("customer_legal")
 }