Fix debug upload persistence and UX; exclude prod audit log from DB restore

Uploads and fixes now bust browser cache via file-mtime keys in API
responses. Debug upload shows a centered loading overlay and blocks search
while uploading. Prod DB restore skips curator_audit_log.

Co-authored-by: Cursor <cursoragent@cursor.com>

client/src/components/GalleryLoadingMarker.tsx

@@ -6,6 +6,8 @@ interface Props {
   overlay?: boolean;
   /** Compact strip along the bottom — does not block interaction. */
   banner?: boolean;
+  /** Inline row for small panels (debug upload, etc.). */
+  compact?: boolean;
   className?: string;
 }
 
@@ -13,13 +15,16 @@ export default function GalleryLoadingMarker({
   message = 'Loading…',
   overlay = false,
   banner = false,
+  compact = false,
   className = '',
 }: Props) {
   const modeClass = overlay
     ? ' gallery-loading-marker-overlay'
     : banner
       ? ' gallery-loading-marker-banner'
-      : '';
+      : compact
+        ? ' gallery-loading-marker-compact'
+        : '';
 
   return (
     <div