fix(review): address CodeRabbit review feedback

- Guard prepare script for Docker builds without .git
- Add pre-push hook for heavier quality gates (typecheck/test/build)
- Pin drizzle-orm version in scripts/package.json
- Add E2E_SMOKE_ALLOW_WRITE opt-in guard via e2eEnv abstraction
- Create @household/config env-e2e.ts using same t3-env + zod pattern
- Make e2e teardown robust with optional chaining + allSettled
- Fix markdown code block language identifier (MD040)
- Fix CI integration docs to reflect actual workflow

package.json

@@ -11,7 +11,7 @@
     "build": "bun run --filter '*' build",
     "typecheck": "bun run --filter '*' typecheck",
     "test": "bun run --filter '*' test",
-    "prepare": "lefthook install",
+    "prepare": "[ -d .git ] && lefthook install || true",
     "lint": "oxlint .",
     "lint:fix": "oxlint --fix .",
     "format": "bunx oxfmt .",