DBC22-6880: show list update indicators on first visit

[ray-oxd]

📝 Submitter

🔗 JIRA Ticket

• Ticket Link: DBC22-6880

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✅ Quality Assurance & Requirements

• Requirements Met: I have confirmed that all acceptance criteria from the JIRA ticket are fulfilled.
• Tested desktop in local or dev envs
• Tested mobile in local or dev envs
• Ran unit tests locally
• SonarCloud: I have verified that the SonarCloud analysis is clean/passing for this branch.

⚙️ Configuration & Environment

• New Env Variables: No

🧪 How to Test (if required)

Precondition: An advisory (and optionally bulletin) already exists.

1. In CMS, edit an Advisory or Bulletin and Publish with notifications.
2. Open DriveBC in a fresh/incognito session. Confirm the header update pill is visible.
3. Navigate to the Advisories (or Bulletins) list via the header — do not refresh.
4. Confirm the updated item(s) show list indicators (blue highlight + Updated pill) on first entry.
5. Confirm a hard refresh is no longer required to see which items are updated.

Note: Bulletin list indicators may still be masked if DBC22-6874 is not merged (header count missing). Viewing one item clearing all indicators is covered by DBC22-6876.

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🔍 Reviewer Checklist

• Reviewed code for logic and cleanliness
• Re-tested desktop/mobile in local or dev envs
• Verified no new console warnings/errors
• Confirmed that any new env variables are understood/documented