Add a Network ports section noting that the mDNS (UDP 5353) and SSDP
(UDP 1900) ports are fixed by their protocols and must be available on
the host, alongside the configurable web server port.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Adds the retention.window option to the NixOS module and documents it
in the README alongside a new Storage considerations section covering
per-network-size estimates and guidance on tuning scan timings and the
retention window to meet storage requirements.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
