Tenants migrating spatial data need PostGIS, but the chart always runs
the CloudNativePG PostgreSQL image, which does not ship it, and exposes
no way to pick another one. CloudNativePG publishes a PostGIS operand
image; a closed `flavor` enum selects it without handing tenants a free
image field.
The flavor pins the same PostgreSQL minor as the default one, on the
standard-trixie variant: backups go through the barman-cloud plugin,
so the deprecated system variant is not needed. update-versions.sh now
derives the postgis map from the minors it picks, and a bats check
fails if the two maps drift apart.
The default images are built on bullseye and the postgis ones on
trixie. Switching a live cluster between them would swap glibc under
an initialised data directory and silently break every collatable
index, and CNPG would roll it out as a plain image update. The chart
therefore refuses a flavor change on an existing Cluster.
Co-authored-by: Matthieu <matthieu@hidora.com>
Assisted-by: LLM
Signed-off-by: Mattia Eleuteri <mattia@hidora.io>
