fix: Add Infisical network to docker-compose.prod.yml

Container needs access to infisical_infisical-internal network
to fetch secrets at startup.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docker-compose.prod.yml

@@ -34,6 +34,7 @@ services:
       - /tmp
     networks:
       - traefik-public
+      - infisical_infisical-internal
 
 volumes:
   upload_data:
@@ -41,3 +42,5 @@ volumes:
 networks:
   traefik-public:
     external: true
+  infisical_infisical-internal:
+    external: true