feat: configure Vercel to wait for CI before deploying

- Update GitHub Actions CI workflow to use Node 22
- Add architecture and deadcode checks to CI pipeline
- Create Vercel deployment guard script
- Add comprehensive deployment documentation
- Update README with CI badge and quality gates info
- Configure vercel.json for deployment settings

Vercel will now only deploy to production after all CI checks pass:
- Linting & formatting
- Type checking
- Tests
- Build verification
- Architecture validation
- Dead code detection

See DEPLOYMENT.md for configuration instructions.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

vercel.json

@@ -0,0 +1,12 @@
+{
+	"$schema": "https://openapi.vercel.sh/vercel.json",
+	"git": {
+		"deploymentEnabled": {
+			"main": true
+		}
+	},
+	"github": {
+		"silent": false,
+		"autoJobCancelation": true
+	}
+}