Add MVP server travel flow

Docs/MultiplayerNetworkingDesign.md

@@ -138,6 +138,19 @@ MVP join flow:
 The first MVP does not need account services, matchmaking, or full character
 persistence. It does need a deterministic flow that can be tested repeatedly.
 
+## Server Travel Flow
+
+MVP server travel is intentionally allowlisted. The admin/dev command
+`AgrarianServerTravel GroundZero` routes through the server and resolves to:
+
+```text
+/Game/Agrarian/Maps/L_GroundZeroTerrain_Test?listen
+```
+
+This gives listen-server and dedicated-server tests one repeatable travel path
+without exposing arbitrary map URLs to clients. Future travel expansion should
+add explicit tile/session validation before allowing any new map or region.
+
 ## Spawn And Respawn
 
 Initial MVP spawn:

Docs/Ops/DedicatedServerBuildRunbook.md

@@ -78,6 +78,15 @@ First cloud/server launch target:
 ./AgrarianGameServer L_GroundZeroTerrain_Test?listen -log -port=7777
 ```
 
+In-game/admin MVP travel command:
+
+```text
+AgrarianServerTravel GroundZero
+```
+
+This command is allowlisted to the Ground Zero MVP map and should remain the
+only server travel path until tile/session validation is stronger.
+
 Systemd launch target created by the bootstrap script:
 
 ```bash