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/Backend/src/queue/processors/ccaClaimProcessor.ts

@@ -79,7 +79,7 @@ export interface CCAClaimProcessorInput {
 export async function runCCAClaimProcessor(
   input: CCAClaimProcessorInput,
   jobId: string
-): Promise<{ status: string; claimNumber?: string | null; pdfFileId?: number | null }> {
+): Promise<{ status: string; claimNumber?: string | null; pdfFileId?: number | string | null }> {
   const { enrichedPayload, userId, claimId, socketId } = input;
 
   log("cca-claim-processor", "starting Python agent session", { claimId });
@@ -106,19 +106,22 @@ export async function runCCAClaimProcessor(
     seleniumResult?.pdfFilename || `cca_claim_${claimId ?? "unknown"}_${Date.now()}.pdf`;
 
   // Save PDF to patient's Claims document group
-  let pdfFileId: number | null = null;
+  let pdfFileId: number | string | null = null;
   if (pdfBase64 && enrichedPayload?.claim?.patientId) {
     try {
       const patientId = Number(enrichedPayload.claim.patientId);
       const pdfBuffer = Buffer.from(pdfBase64, "base64");
-      let group = await storage.findPdfGroupByPatientTitleKey(patientId, "INSURANCE_CLAIM");
-      if (!group) {
-        group = await storage.createPdfGroup(patientId, "Claims", "INSURANCE_CLAIM");
-      }
-      const created = await storage.createPdfFile(group.id!, pdfFilename, pdfBuffer);
-      if (created && typeof created === "object" && "id" in created) {
-        pdfFileId = Number((created as any).id);
-      }
+      const patient = await storage.getPatient(patientId);
+      const patientName = patient ? `${patient.firstName ?? ""} ${patient.lastName ?? ""}`.trim() : "";
+      const cloudFile = await storage.savePdfToCloudStorage(
+        userId,
+        patientId,
+        patientName || `Patient ${patientId}`,
+        "Claims",
+        pdfFilename,
+        pdfBuffer
+      );
+      pdfFileId = `cloud:${cloudFile.id}`;
       log("cca-claim-processor", "PDF saved", { pdfFilename, pdfFileId, patientId });
     } catch (e: any) {
       log("cca-claim-processor", "failed to save PDF", { error: e?.message });