jellyfin: fix caddy reverse proxy

services/jellyfin/jellyfin.nix

@@ -26,6 +26,14 @@
 
   services.caddy.virtualHosts."jellyfin.${service_configs.https.domain}".extraConfig = ''
     reverse_proxy :${builtins.toString service_configs.ports.private.jellyfin.port} {
+      # Disable response buffering for streaming. Caddy's default partial
+      # buffering delays fMP4-HLS segments and direct-play responses where
+      # Content-Length is known (so auto-flush doesn't trigger).
+      flush_interval -1
+      transport http {
+        # Localhost: compression wastes CPU re-encoding already-compressed media.
+        compression off
+      }
       header_up X-Real-IP {remote_host}
       header_up X-Forwarded-For {remote_host}
       header_up X-Forwarded-Proto {scheme}