Update CEPH health check

[mattldawson]

Description of PR purpose/changes

This PR updates the health check for CEPH using the Docker compose configuration. The previous check was only checking that the CEPH endpoint was reachable, but this led to a race condition which was causing intermittent action failures. It seems like the endpoint can become accessible before any OSDs have connected.

Copilot came up with this solution, but it looks reasonable to me, and it seems to be consistent with the errors in the action logs.

Testing Instructions

• Details for how to test the PR:

• Tests pass locally and in GitHub Actions
  Tests are not passing because of an unrelated problem with parsing NCBI assembly summary files.

Dev Checklist:

• My submission follows the AI Covenant principles
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• N/A I have made corresponding changes to the documentation
• My changes generate no new warnings
• N/A I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes (except for already failing tests)
• I have run Ruff format to format my code
• I have run Ruff check and fixed any errors that it uncovered

Updating Version and Release Notes (if applicable)

N/A

[Copilot]

Pull request overview

This PR updates the ceph service healthcheck in docker-compose.yml to avoid intermittent CI failures by waiting for at least one OSD to be up before considering the RGW endpoint ready.

Changes:

• Replace the prior “HTTP reachable” healthcheck with a two-part check: ceph osd stat + RGW HTTP probe.
• Adjust healthcheck timing parameters (timeout/retries) to better tolerate startup delays.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 68.57%. Comparing base (44d07a0) to head (c01480f).
⚠️ Report is 5 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #202      +/-   ##
===========================================
+ Coverage    68.38%   68.57%   +0.19%     
===========================================
  Files           72       73       +1     
  Lines         4432     4462      +30     
===========================================
+ Hits          3031     3060      +29     
- Misses        1401     1402       +1     

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