fix(server): isolate event schema types

packages/server/src/groups/event.ts

@@ -1,17 +1,25 @@
 import { EventV2 } from "@opencode-ai/core/event"
+import { Location } from "@opencode-ai/core/location"
 import { Schema } from "effect"
 import { HttpApiEndpoint, HttpApiGroup, OpenApi } from "effect/unstable/httpapi"
 
+const fields = {
+  id: EventV2.ID,
+  metadata: Schema.optional(Schema.Record(Schema.String, Schema.Unknown)),
+  durable: Schema.optional(Schema.Struct({ aggregateID: Schema.String, seq: Schema.Int, version: Schema.Int })),
+  location: Schema.optional(Location.Ref),
+}
+
 const Event = Schema.Union([
   ...EventV2.definitions().map((definition) =>
     Schema.Struct({
-      ...EventV2.Payload.fields,
+      ...fields,
       type: Schema.Literal(definition.type),
-      data: definition.data,
+      data: definition.data as Schema.Struct<{}>,
     }).annotate({ identifier: `V2Event.${definition.type}` }),
   ),
   Schema.Struct({
-    ...EventV2.Payload.fields,
+    ...fields,
     type: Schema.Literal("server.connected"),
     data: Schema.Struct({}),
   }).annotate({ identifier: "V2Event.server.connected" }),