feat: add git reference support for scenario previews; implement git ref handling in admin router and frontend

app/gateway-api/package.json

@@ -31,6 +31,7 @@
         "@sammo-ts/common": "workspace:*",
         "@sammo-ts/game-engine": "workspace:*",
         "@sammo-ts/infra": "workspace:*",
+        "@sammo-ts/logic": "workspace:*",
         "@trpc/server": "^11.8.1",
         "date-fns": "^4.1.0",
         "es-toolkit": "^1.43.0",