Add an opt-in Gateway API HTTPRoute template to the Helm chart as an
alternative to the existing Ingress, addressing #9942. It is disabled by
default (httpRoute.enabled: false) so existing installs are unaffected.
The template mirrors the existing ingress.yaml conventions: the
pgadmin4.fullname backend, commonLabels/commonAnnotations propagation, and
a hostname that falls back to ingress.hostname when httpRoute.hostnames is
unset. parentRefs is required (a fail guard fires when it is empty),
apiVersion defaults to gateway.networking.k8s.io/v1, and the default rule
forwards "/" (PathPrefix) to the pgAdmin service. Custom hostnames and
rules can be supplied for full control. The new values are documented in
the chart README.
The two init containers in the Helm deployment template had hardcoded
securityContext blocks, unlike the main container which already renders
its context from .Values.containerSecurityContext via the
renderSecurityContext helper. Switch the init containers to the same
pattern so operators can customise (or disable) their security context.
Default behaviour is unchanged: containerSecurityContext defaults to
enabled with values identical to the previous hardcoded block, and the
helper continues to gate appArmorProfile on
global.compatibility.appArmor.enabled. Verified with helm template that
the rendered init-container securityContext is unchanged for the default
values, honours the appArmor toggle, and is omitted entirely when
containerSecurityContext.enabled=false.
Adds a 9.16 release note.