feat(FN-2361): codify workspace verification bootstrap contract

- Add root verify:workspace script enforcing lint -> test -> build order
- Update CI workflow to run verify:workspace as the single workspace gate before binary packaging
- Add CLI guardrail tests for workflow sequencing and root script contract invariants
- Document deterministic workspace bootstrap expectations in contributing guide
- Clarify bundle-output test bootstrap intent for explicit artifact setup

package.json

@@ -19,6 +19,7 @@
     "dev:hmr": "node scripts/dev-hmr.mjs",
     "lint": "eslint .",
     "build": "pnpm -r build",
+    "verify:workspace": "pnpm lint && pnpm test && pnpm build",
     "build:exe": "pnpm build && pnpm --filter @runfusion/fusion build:exe",
     "build:exe:all": "pnpm build && pnpm --filter @runfusion/fusion build:exe:all",
     "test": "VITEST_MAX_WORKERS=4 pnpm -r --workspace-concurrency=2 test",