fix: Tufts SCO + UnitedDH pre-auth file upload, tooth fill, PDF and pre-auth number

- Frontend: upload attachments to disk before sending pre-auth payload (same pattern as claims)
- cloud-storage: finalizeFileUpload returns diskPath so Python workers get real file paths
- upload-to-cloud route: return diskPath instead of API URL
- TuftsSCO preAuth worker: skip 'Add a file' button click; send_keys directly to hidden react-aria-Input
- TuftsSCO preAuth worker: JS focus() on tooth field to bypass warning-banner overlay
- TuftsSCO preAuth worker: 1.5s wait after procedure code for layout shift to settle
- TuftsSCO preAuth worker: step8 waits for 'thank' in page_source then extracts via 'submitted pre-authorization' regex
- helpers_tuftssco_preauth: convert pdf_path → pdf_url (http://localhost:5002/downloads/...)
- tuftsSCOPreAuthProcessor: use pdf_url (not pdf_path), save preAuthNumber to preAuthNumber field
- unitedDHPreAuthProcessor: save preAuthNumber to preAuthNumber field (not claimNumber)

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

apps/Backend/src/storage/cloudStorage-storage.ts

@@ -106,7 +106,7 @@ export interface IStorage {
     folderId?: number | null
   ): Promise<CloudFile>;
   appendFileChunk(fileId: number, seq: number, data: Buffer): Promise<void>;
-  finalizeFileUpload(fileId: number): Promise<{ ok: true; size: string }>;
+  finalizeFileUpload(fileId: number): Promise<{ ok: true; size: string; diskPath: string }>;
   deleteFile(fileId: number): Promise<boolean>;
   updateFile(
     id: number,
@@ -354,7 +354,7 @@ export const cloudStorageStorage: IStorage = {
     });
     await updateFolderTimestampsRecursively(file.folderId);
 
-    return { ok: true, size: BigInt(total).toString() };
+    return { ok: true, size: BigInt(total).toString(), diskPath };
   },
 
   async deleteFile(fileId: number) {