feat: save claim attachments to cloud storage and documents page

- Claim file uploads (chatbot or manual) now save to both the Cloud
  Storage patient folder and the Documents page via new
  POST /api/claims/upload-to-cloud endpoint
- MH submit flow now calls uploadAttachmentsToLocalFolder (same as
  DDMA/United/Tufts) so chatbot-attached X-rays are persisted
- Removed old /upload-attachments disk route and attachmentDiskStorage
  multer config; deleted uploads/patients/ folder
- uploadAttachmentsToLocalFolder now points to /upload-to-cloud and
  sends patientId so the backend can create the patient folder

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

apps/Backend/src/cron/backupCheck.ts

@@ -78,7 +78,7 @@ export const startBackupCron = () => {
     const log = await cronJobLogStorage.createJobLog("local-backup", startedAt);
 
     try {
-      const filename = `dental_backup_${Date.now()}.sql`;
+      const filename = `dental_backup_${Date.now()}.zip`;
       await backupDatabaseToPath({ destinationPath: LOCAL_BACKUP_DIR, filename });
       pruneOldBackups(LOCAL_BACKUP_DIR);
       await storage.createBackup(admin.id);
@@ -153,7 +153,7 @@ export const startBackupCron = () => {
     }
 
     try {
-      const filename = `dental_backup_usb_${Date.now()}.sql`;
+      const filename = `dental_backup_usb_${Date.now()}.zip`;
       await backupDatabaseToPath({ destinationPath: usbBackupPath, filename });
       pruneOldBackups(usbBackupPath);
       await storage.createBackup(admin.id);