## **Description:**
**What type of PR is this?**
> Bug fix
**What does this PR do? Why is it needed?**
Replaces fixed `time.Sleep(time.Second)` delays in `TestLifecycle` with
active polling to wait for service readiness/shutdown. This improves
test reliability and reduces execution time by eliminating unnecessary
waits when services start/stop faster than expected.
**Which issues(s) does this PR fix?**
N/A - Minor test improvement
**Other notes for review**
- Uses 50ms polling interval with 3s timeout for both startup and
shutdown checks
- Maintains same test logic while making it more efficient and less
flaky
- No functional changes to the service itself
**Acknowledgements**
- [x] I have read
[CONTRIBUTING.md](https://github.com/prysmaticlabs/prysm/blob/develop/CONTRIBUTING.md).
- [ ] I have included a uniquely named [changelog fragment
file](https://github.com/prysmaticlabs/prysm/blob/develop/CONTRIBUTING.md#maintaining-changelogmd).
- [x] I have added a description to this PR with sufficient context for
reviewers to understand this PR.
