refactor(schema): declare event durability at definition level (#35172)

packages/schema/src/reference.ts

@@ -2,10 +2,10 @@ export * as Reference from "./reference.js"
 
 import { Schema } from "effect"
 import { optional } from "./schema.js"
-import { define, inventory } from "./event.js"
+import { ephemeral, inventory } from "./event.js"
 import { AbsolutePath } from "./schema.js"
 
-const Updated = define({ type: "reference.updated", schema: {} })
+const Updated = ephemeral({ type: "reference.updated", schema: {} })
 export const Event = { Updated, Definitions: inventory(Updated) }
 
 export interface LocalSource extends Schema.Schema.Type<typeof LocalSource> {}