v0.35.1: performance, AGPL licensing and documentation overhaul

- Web Server reads static files inline; proxy middleware chain flattened
- About window with license summary and project links; AGPL-3.0-or-later
- Rewritten documentation: feature list, screenshots, performance guide
- Fix false spikes in per-Vhost request-rate charts

docker-agent/install.sh

@@ -28,8 +28,7 @@ install -d -o rustproxy-docker-agent -g docker -m 0750 /var/lib/rustproxy-docker
 if [[ ! -f /etc/rustproxy/docker-agent.env ]]; then
   install -m 0600 docker-agent.env.example /etc/rustproxy/docker-agent.env
 fi
-# The Go CLI is the single implementation for both manual and packaged
-# provisioning; it preserves existing credentials, certificate and key.
+# Provisioning is delegated to the Go CLI, which keeps existing credentials.
 /usr/local/bin/rustproxy-docker-agent init
 install -m 0644 rustproxy-docker-agent.service /etc/systemd/system/rustproxy-docker-agent.service
 systemctl daemon-reload