Document 2.x routing model with a concrete TG 52090 example, operator-focused
performance gains (indexes, reporting, integrated proxy), and MkDocs Mermaid
support across server and monitor architecture pages.
Document ADN-report-proxy so adn-server 2.x can feed v1 legacy monitors,
and sync EN/ES MkDocs with DATABASE, dynamic TGs, monitoring, and related topics.
Replace internal bridge terminology with routing (RoutingUseCases, AclRouter,
routing_table export). SubscriptionStore remains runtime authority with O(1)
indexes for router and downlink filters. Fix STATIC TG parity on OPTIONS/RPTO,
parrot in-band edge cases, and remove per-packet routing_table export from the
hot path that caused high CPU under multi-hotspot OBP load.