Make the Eve onboarding checkpoint run against the contract that exists

The portability workflow has been red since 2026-08-22. Three things,
each hidden behind the one before it:

- Eve started refusing to build a command intent for a surface that has
  not advertised a command boundary and receipt schema (Eve 4338a42,
  2026-08-22). The two-runtime sample never advertised one. It now passes
  a provider advertisement with worldInteraction for its surface, which is
  the declaration the lowering was right to demand.
- The sample and the package-closure script still imported "cultcache-ts";
  the package became @gamecult/cultcache-ts on 2026-09-04 (8cb3b72) and
  CI never got far enough to say so. Two READMEs carried the same import.
- The job pinned Eve to codex/eve-browser-host-isolation, a branch that was
  never merged and stopped moving on 2026-08-25. The sample is written
  against Eve main and passes there; the pin now says so.

The interop workflow's Python step ran one test file by path; it now
discovers the three split suites.

  scripts/verify-eve-two-runtime-sample.ps1 -EveRoot F:\Projects\Eve
  (Eve main ccc3ffe) -> browserCount 1, headlessCount 1, restartCount 1

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

scripts/test-typescript-package-closure.mjs

@@ -58,7 +58,7 @@ try {
 
   writeFileSync(join(consumerRoot, "runtime-smoke.cjs"), `
 const assert = require("node:assert/strict");
-const cache = require("cultcache-ts");
+const cache = require("@gamecult/cultcache-ts");
 const net = require("cultnet-ts");
 const mesh = require("cultmesh-ts");
 assert.equal(typeof cache.defineDocumentType, "function");
@@ -81,7 +81,7 @@ assert.equal("putDocument" in CultMeshBrowserClient.prototype, false);
   execFileSync(process.execPath, ["browser-runtime-smoke.mjs"], { cwd: consumerRoot, stdio: "inherit" });
 
   writeFileSync(join(consumerRoot, "types-smoke.ts"), `
-import { defineDocumentType } from "cultcache-ts";
+import { defineDocumentType } from "@gamecult/cultcache-ts";
 import { CultNetPeer } from "cultnet-ts";
 import {
   CultMesh,