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`.
nicktrn
a8966a40ab