refactor(httpapi): describe bodyless global upgrade payload

packages/opencode/src/server/routes/instance/httpapi/groups/global.ts

@@ -3,7 +3,7 @@ import { BusEvent } from "@/bus/bus-event"
 import { SyncEvent } from "@/sync"
 import "@/server/event"
 import { Schema } from "effect"
-import { HttpApi, HttpApiEndpoint, HttpApiError, HttpApiGroup, OpenApi } from "effect/unstable/httpapi"
+import { HttpApi, HttpApiEndpoint, HttpApiError, HttpApiGroup, HttpApiSchema, OpenApi } from "effect/unstable/httpapi"
 import { described } from "./metadata"
 
 const GlobalHealth = Schema.Struct({
@@ -92,7 +92,7 @@ export const GlobalApi = HttpApi.make("global").add(
         }),
       ),
       HttpApiEndpoint.post("upgrade", GlobalPaths.upgrade, {
-        payload: GlobalUpgradeInput,
+        payload: [HttpApiSchema.NoContent, GlobalUpgradeInput],
         success: described(GlobalUpgradeResult, "Upgrade result"),
         error: HttpApiError.BadRequest,
       }).annotateMerge(