feat: save insurance PDFs (eligibility/claims/preauth) to Cloud Storage instead of Postgres blobs

New saves go into the patient's Cloud Storage folder under category subfolders
(Eligibility/Claims/PreAuth/Claim Status/Attachments) via a new
storage.savePdfToCloudStorage helper, instead of the legacy PdfGroup/PdfFile
Postgres blob tables. Old records and their read paths are left untouched for
backward compatibility; PDF list/content/delete endpoints and viewers now
transparently handle both legacy numeric ids and new "cloud:<id>" ids.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/Frontend/src/components/insurance-status/united-sco-button-modal.tsx

@@ -89,7 +89,7 @@ interface UnitedSCOEligibilityButtonProps {
   isFormIncomplete: boolean;
   autoTrigger?: boolean;
   onAutoTriggered?: () => void;
-  onPdfReady: (pdfId: number, fallbackFilename: string | null) => void;
+  onPdfReady: (pdfId: number | string, fallbackFilename: string | null) => void;
 }
 
 export function UnitedSCOEligibilityButton({
@@ -243,7 +243,7 @@ export function UnitedSCOEligibilityButton({
           queryClient.invalidateQueries({ queryKey: QK_PATIENTS_BASE });
           const pdfId = data.result?.pdfFileId;
           if (pdfId) {
-            onPdfReady(Number(pdfId), data.result?.pdfFilename ?? `eligibility_unitedsco_${memberId}.pdf`);
+            onPdfReady(pdfId, data.result?.pdfFilename ?? `eligibility_unitedsco_${memberId}.pdf`);
           }
         } else if (data.status === "failed") {
           const msg = data.error ?? "United SCO eligibility job failed.";