Release 0.1.0

Steward's first release: a DHCPv4 server with subnets per interface,
reservations (by MAC address, client ID or either, with their own lease
time), a web UI, REST API and CLI, Kea import, the web UI's certificate
through Jarl, clients' last-seen times, the activity log by subnet,
hidden interfaces and the address order per subnet and pool. make test
and make e2e (124 checks with udhcpc and dhcpcd) pass.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

CHANGELOG.md

@@ -4,7 +4,7 @@ All notable changes to Steward are documented here. The format follows
 [Keep a Changelog](https://keepachangelog.com/en/1.1.0/), and versions follow
 [Semantic Versioning](https://semver.org/).
 
-## [Unreleased]
+## [0.1.0] - 2026-10-18
 
 The first version of Steward, a DHCPv4 server with a web UI, a REST API
 and a CLI, built the way Jarl is.