fix(kube): replace dead keep-test Electrum endpoint

[mswilkison]

Summary

• replace the unreachable keep-test Electrum WSS endpoint used by the TBTC v2 minter and guardian
• align the deployment with the BOAR testnet endpoint already used by the embedded configuration and integration tests
• preserve the existing ConfigMap and StatefulSet wiring

The legacy endpoint timed out during connection testing, while the replacement completed an Electrum WSS connection successfully.

Validation

• git diff --check
• repository-wide search confirms the legacy hostname is gone
• kubectl kustomize infrastructure/kube/keep-test/tbtc-v2-maintainer, using temporary placeholder files for the gitignored password secrets
• targeted Electrum WSS integration connection test

Fixes #4163

[coderabbitai]

📝 Walkthrough

Walkthrough

The keep-test tbtc-v2-maintainer Kubernetes configuration updates its generated Electrum WSS URL to a new Electrum testnet endpoint.

Changes

Electrum endpoint update

Layer / File(s)	Summary
Update Electrum WSS configuration infrastructure/kube/keep-test/tbtc-v2-maintainer/kustomization.yaml	The electrumx-url-wss ConfigMap literal now points to wss://electrum.testnet.boar.network:443/QxbJgaSLUHqrgAa9BW7bDpnGPxrlhnCa.

Estimated code review effort: 1 (Trivial) | ~2 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Meets [#4163] by updating electrumx-url-wss to a healthy WSS endpoint while keeping the ConfigMap/StatefulSet wiring intact.
Out of Scope Changes check	✅ Passed	Only the requested endpoint replacement is changed; no unrelated config or code was added.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly reflects the main change: replacing the broken keep-test Electrum endpoint in kube config.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/keep-test-maintainer-electrum

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}