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

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MMsgSXoK4Bph2vU6fSBkAH

integrations/routeros-oci-build/README.md

@@ -77,10 +77,10 @@ ENV_FILE=integrations/routeros-oci-build/.env \
   bash integrations/routeros-oci-build/build-routeros-oci.sh push
 ```
 
-With RustProxy version `0.25.0` and the defaults this publishes:
+For example, with RustProxy version `0.35.1` and the defaults this publishes:
 
 ```text
-zot.example.net/network/rustproxy:0.25.0
+zot.example.net/network/rustproxy:0.35.1
 zot.example.net/network/rustproxy:latest
 zot.example.net/network/rustproxy:routeros
 ```