Prevent caching of keeper status responses

[karagozemin]

Goal\nEnsure keeper health and status responses are never served from stale caches.\n\n## Acceptance criteria\n- Add an explicit no-store cache header to status endpoints.\n- Cover all status routes with response-header tests.\n- Preserve existing response bodies.\n\n## Wave complexity (maintainer)\nHigh - 200 points

[richiesplug]

@richiesplug has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

I’m interested in contributing to this issue and would be happy to work on it

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[veemakama]

@veemakama has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi, i would love to work on this.

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[akinerin]

@akinerin has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

I would love to work on this issue, please assign it to me

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[Kappa16]

@Kappa16 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

PLEASE I would like to work on this issue, expect PR ASAP 🙏😞

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[drips-wave]

Congratulations, @akinerin! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on August 31, 2026.

🧑‍💻 @akinerin: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

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[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox!

@akinerin's PR #294 was approved and merged by @karagozemin.

🏆 @akinerin: You earned 35 FoxPoints for this contribution! Your current tier: Explorer (70 total points). Track your full progress on GrantFox.

👏 Great work, @akinerin! Keep contributing to Sub-Rosa-Issue.