feat(opencode): improve telemetry tracing and request spans (#22653)

packages/opencode/src/effect/app-runtime.ts

@@ -49,7 +49,6 @@ import { ShareNext } from "@/share/share-next"
 import { SessionShare } from "@/share/session"
 
 export const AppLayer = Layer.mergeAll(
-  Observability.layer,
   AppFileSystem.defaultLayer,
   Bus.defaultLayer,
   Auth.defaultLayer,
@@ -95,7 +94,7 @@ export const AppLayer = Layer.mergeAll(
   Installation.defaultLayer,
   ShareNext.defaultLayer,
   SessionShare.defaultLayer,
-)
+).pipe(Layer.provideMerge(Observability.layer))
 
 const rt = ManagedRuntime.make(AppLayer, { memoMap })
 type Runtime = Pick<typeof rt, "runSync" | "runPromise" | "runPromiseExit" | "runFork" | "runCallback" | "dispose">