Merge edge into feat/title-conditions: §3's zone presets

Two conflicts, both additive: schema.sql and purge.sql keep both phases'
tables. Swagger fragment (61 paths) and routes.manifest (67 routes)
regenerated against the pinned core; 455 server and 58 client tests pass.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01E14m6SuuY6i1vASFeGDBeY

server/db/purge.sql

@@ -19,6 +19,10 @@
 -- it knows this module registered, because it is the side that knows which
 -- registrant owned what.
 
+-- Zone presets (PLAN_REDESIGNS §3.1). The server list before its preset.
+DROP TABLE IF EXISTS rust_zone_preset_servers;
+DROP TABLE IF EXISTS rust_zone_presets;
+
 -- The chat-title conditions (PLAN_REDESIGNS §5). No foreign keys; the stats
 -- columns go with their table below.
 DROP TABLE IF EXISTS rust_title_categories;