refactor!: simplify runtime tools and remove replay engines (#572)

* fix(hopper): report unavailable procedure body coverage

* refactor!: simplify runtime tools and remove replay engines

Keep direct inspection, capture, and comparison tools. Bind handlers to named contracts and let agents compose experiments with commands and local fixture servers.

BREAKING CHANGE: Remove controlled replay, Node characterization, finite replay-machine, managed runtime planning, and redundant string-tracing tools. Retire process replay, shims, reactive scenarios, custom checkpoints, and active browser replay and origin-scope inputs.

src/application/ProcessTimer.test.ts

@@ -1,6 +1,5 @@
 import { describe, expect, it } from "vitest";
 
-import { ReplayDelayScheduler } from "./LoopbackReplayRecorder.js";
 import { scheduleProcessDelay } from "./ProcessTimer.js";
 
 describe("process delay scheduling", () => {
@@ -36,15 +35,4 @@ describe("process delay scheduling", () => {
     scheduled[1]?.callback();
     expect(fired).toBe(false);
   });
-
-  it("releases owned replay delays when the endpoint closes", async () => {
-    const scheduler = new ReplayDelayScheduler();
-    const waiting = scheduler.wait(Number.MAX_SAFE_INTEGER);
-
-    scheduler.close();
-    scheduler.close();
-    await waiting;
-
-    await scheduler.wait(Number.MAX_SAFE_INTEGER);
-  });
 });