Upgrade Node.js to 24 and update dependencies (#604)

* chore: upgrade Node.js to 24 and update dependencies

- Upgrade Node.js from 20 to 24.15.0 across all CI jobs and workflows
- Run npm audit fix to resolve CVEs in dependencies
- Generate TLS certs dynamically via scripts/gen-tls-certs.sh instead of using static certs
- Add Makefile targets for running each integration test suite locally

* add GOPATH/bin to PATH before running gen-tls-certs.sh

* Add changelog entry

* refactor makefile

* Refine e2e-enterprise pipeline and scripts

.gitignore

@@ -5,6 +5,9 @@ npm-debug.log*
 yarn-debug.log*
 yarn-error.log*
 
+# Build artifacts
+.build/
+
 # Runtime data
 pids
 *.pid