feat(romhacks): serve library over internal Caddy file_server; notes embed art + guide links

- proxy: read-only bind /storage1/labdata/romhacks/library -> /srv/romhacks
- Caddyfile: romhacks-files.ginnoir.com (internal_only) file_server + browse
- render_catalog_notes.py + handoff.py: embed box art and link guides/
  spreadsheets via https://romhacks-files.ginnoir.com/<slug>/<file>
  (handoff art/guides; guide filter drops buried game-data txt, caps at 30)
- regenerate bookmarks

bookmarks-ports.html

@@ -57,6 +57,11 @@
             <DT><A HREF="http://valhalla:7575">homarr</A>
         </DL><p>
 
+        <DT><H3>Notes</H3>
+        <DL><p>
+            <DT><A HREF="http://valhalla:5984">couchdb</A>
+        </DL><p>
+
         <DT><H3>Notify</H3>
         <DL><p>
             <DT><A HREF="http://valhalla:8000">ntfy :8000</A>
@@ -88,6 +93,11 @@
             <DT><A HREF="http://valhalla:3000">resume</A>
         </DL><p>
 
+        <DT><H3>Romhacks</H3>
+        <DL><p>
+            <DT><A HREF="http://valhalla:8998">jdownloader :8998</A>
+        </DL><p>
+
         <DT><H3>Roms</H3>
         <DL><p>
             <DT><A HREF="http://valhalla:8997">romm :8997</A>