fix(rgi): correct download flow — confirmOnView + downloadFile by documentPk

The download uses documentPk (not documentTypeId) as the file identifier:
1. confirmOnView/{wid}/{appId}/{documentPk} — confirm view
2. loadDocument/downloadFile/{wid}/{documentPk} — actual download

Removed fileVisibility step (not needed, was causing 404).
Updated page download links to pass documentPk.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/app/(modules)/rgi-test/page.tsx

@@ -296,7 +296,7 @@ function IssuedDocsPanel({
           </div>
           <Button size="sm" variant="outline" className="shrink-0 gap-1" asChild>
             <a
-              href={`/api/eterra/rgi/download-doc?workspaceId=${doc.workspaceId || workspaceId}&applicationId=${doc.applicationId || applicationPk}&docId=${doc.documentTypeId}&fileId=${doc.documentPk}`}
+              href={`/api/eterra/rgi/download-doc?workspaceId=${doc.workspaceId || workspaceId}&applicationId=${doc.applicationId || applicationPk}&documentPk=${doc.documentPk}`}
               target="_blank"
               rel="noopener noreferrer"
             >