Improve stability of test_update_bucket_history_retention

[DemetrisChr]

Change

Wait until the history changes are propagated to all nodes between the update_bucket and get_bucket calls.

[Copilot]

Pull request overview

This PR aims to reduce flakiness in test_update_bucket_history_retention by adding a consistency wait so bucket history-retention updates are observed across the cluster before assertions run.

Changes:

• Add a new ConsistencyHelper#wait_until_bucket_satisfies_predicate helper for bucket-level propagation checks across all management nodes.
• Update test_update_bucket_history_retention to wait until the bucket’s history retention setting is observed before calling get_bucket.
• Switch management host discovery in ConsistencyHelper#fetch_hosts from configuredHostname to hostname.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
test/utils/consistency_helper.rb	Adjusts management host discovery and adds a new bucket-level predicate wait helper used by tests.
test/bucket_manager_test.rb	Adds a propagation wait between update_bucket and get_bucket for the history-retention test.

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