fix(helm): bump clickhouse subchart 9.3.7 -> 9.4.4 (clickhouse 25.7.5)

[nicktrn]

Fixes #3520. The bundled bitnami clickhouse subchart was pinned at 9.3.7 (clickhouse 25.6.1-debian-12-r0), which hits a memory-tracker accounting bug under sustained ingest - the global counter overflows to ~7 EiB and every query gets rejected by OvercommitTracker until the pod is restarted. Self-hosters running 4.0.5 through 4.4.5 are exposed regardless of chart version since the subchart pin hadn't moved.

Bumping to 9.4.4 (clickhouse 25.7.5-debian-12-r0) pulls in the 25.7.x memory-tracker fixes. This is also the latest publicly packaged release at oci://registry-1.docker.io/bitnamicharts - that registry has been frozen since 2025-08-28 (Bitnami catalog changes), but the chart source remains under Apache 2 on bitnami/charts. The image continues to resolve via bitnamilegacy/clickhouse per the existing values.yaml override, since bitnami/clickhouse itself moved to paid-only.

Verified locally: helm dependency update + helm lint + helm template + kubeconform across all 57 rendered manifests. Rendered statefulset image is docker.io/bitnamilegacy/clickhouse:25.7.5-debian-12-r0.

[changeset-bot]

⚠️ No Changeset found

Latest commit: 494d797

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[github-actions]

🧭 Helm Chart Prerelease Published

Version: 4.4.5-pr3524.494d797

Install:

helm upgrade --install trigger \
  oci://ghcr.io/triggerdotdev/charts/trigger \
  --version "4.4.5-pr3524.494d797"

⚠️ This is a prerelease for testing. Do not use in production.

[coderabbitai]

Walkthrough

This pull request updates ClickHouse dependencies in the Kubernetes Helm chart configuration. The Helm chart dependency specification in Chart.yaml was updated from version 9.3.7 to 9.4.4, and the commented ClickHouse image version reference in values.yaml was updated from 25.6.1-debian-12-r0 to 25.7.5-debian-12-r0. Both changes are version updates with no logic or configuration modifications.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	PR description provides detailed context about the bug fix, version changes, and verification steps, but is missing the required template sections (checklist, testing section, changelog section).	Add the required PR template sections: checklist items, explicit testing steps description, and a changelog entry summarizing the changes.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and specifically describes the main change: bumping the ClickHouse subchart version with the old and new versions and resulting image tag.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

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🧪 Generate unit tests (beta)

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• Commit unit tests in branch fix/helm-clickhouse-subchart-bump

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[devin-ai-integration]

Devin Review found 0 potential issues.

[nicktrn]

ready