feat(roms): add RomM stack (romm + mariadb) over /storage1/Emulation

New per-domain stack centralizing the emulation/ROM library:

- romm (rommapp/romm:4) + dedicated MariaDB; RomM bundles its own Redis

- library mounts existing EmuDeck tree /storage1/Emulation (RomM Structure A) read-write; tiered binds (config->/config, blobs->/storage1/labdata)

- env_file-only config (no ${VAR}) so the git stack needs no Portainer UI env vars

- Hasheous metadata enabled; IGDB/SteamGridDB/ScreenScraper scaffolded empty

- Caddy: roms.ginnoir.com internal_only -> romm:8080; regenerated bookmarks

bookmarks-ports.html

@@ -88,5 +88,10 @@
             <DT><A HREF="http://valhalla:3000">resume</A>
         </DL><p>
 
+        <DT><H3>Roms</H3>
+        <DL><p>
+            <DT><A HREF="http://valhalla:8997">romm :8997</A>
+        </DL><p>
+
     </DL><p>
 </DL><p>