feat: TruePVE in the zone step (PLAN_REDESIGNS §14.3.2, WIP)

Stage 3 of the §14.3 integration plan (D362, D368): world.zone's optional
truePve ({exclude: true} or {ruleset}), all or nothing, unmapped on every
path that erases one of our zones, with truepve.json for erases while
TruePVE is away. Docs and PRs still to come.

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

server/swagger/doc.js

@@ -260,6 +260,11 @@ module.exports = {
                   sizes: { type: 'array', items: { type: 'integer' }, example: [6, 12, 18, 24, 30, 36, 42, 48, 96, 144] },
                 },
               },
+              truePve: {
+                type: 'object',
+                description: 'Protocol 14 (PLAN_REDESIGNS §14.3.2): where loaded, a zone step may turn off PvP protection or name a TruePVE ruleset.',
+                properties: { loaded: { type: 'boolean', example: true }, version: { type: 'string', example: '2.4.6' } },
+              },
             },
           },
         },