fix: add attachment support for all transaction types

Fixed attachments not showing in edit forms for various transaction types by:

1. Adding @InjectAttachable() decorator to models:
   - SaleReceipt, SaleEstimate, CreditNote, PaymentReceived
   - Bill, BillPayment, VendorCredit
   - ManualJournal, Expense

2. Fixing transformers to include attachments in API responses:
   - SaleReceiptTransformer, PaymentReceivedTransformer

3. Registering missing event subscribers in Attachment.module.ts:
   - AttachmentsOnSaleReceipts, AttachmentsOnSaleEstimates

4. Fixing DocumentLink model relation mapping:
   - Changed Document.default to Document for proper module export

5. Fixing PaymentReceived model_ref consistency:
   - Changed from 'PaymentReceive' to 'PaymentReceived' to match class name

6. Adding missing withGraphFetched('attachments') to GetPaymentReceived.service.ts

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

packages/server/src/modules/PaymentReceived/queries/PaymentReceivedTransformer.ts

@@ -2,6 +2,7 @@ import { Transformer } from '../../Transformer/Transformer';
 import { PaymentReceived } from '../models/PaymentReceived';
 import { PaymentReceivedEntry } from '../models/PaymentReceivedEntry';
 import { PaymentReceivedEntryTransfromer } from './PaymentReceivedEntryTransformer';
+import { AttachmentTransformer } from '@/modules/Attachments/Attachment.transformer';
 
 export class PaymentReceiveTransfromer extends Transformer {
   /**
@@ -17,6 +18,7 @@ export class PaymentReceiveTransfromer extends Transformer {
       'formattedAmount',
       'formattedExchangeRate',
       'entries',
+      'attachments',
     ];
   };
 
@@ -89,4 +91,13 @@ export class PaymentReceiveTransfromer extends Transformer {
   protected entries = (payment: PaymentReceived): PaymentReceivedEntry[] => {
     return this.item(payment.entries, new PaymentReceivedEntryTransfromer());
   };
+
+  /**
+   * Retrieves the payment received attachments.
+   * @param {PaymentReceived} payment
+   * @returns
+   */
+  protected attachments = (payment: PaymentReceived) => {
+    return this.item(payment.attachments, new AttachmentTransformer());
+  };
 }