refactor(truncation): effectify TruncateService, delete Scheduler (#17957)

packages/opencode/test/fixture/effect.ts

@@ -1,7 +0,0 @@
-import { test } from "bun:test"
-import { Effect, Layer } from "effect"
-
-export const testEffect = <R, E>(layer: Layer.Layer<R, E, never>) => ({
-  effect: <A, E2>(name: string, value: Effect.Effect<A, E2, R>) =>
-    test(name, () => Effect.runPromise(value.pipe(Effect.provide(layer)))),
-})