The bash :report implementation for the nginx-vhosts plugin is replaced with a compiled golang binary that reuses the plugin's existing golang property getters, so every raw, global and computed key is unchanged while collection runs in parallel and json is marshalled directly. The global report keeps its existing behaviour of surfacing only the global keys.
Three plugins still leaked the built-in default through `<plugin>-global-<property>` after the broader raw/computed split in #8640. External tooling reading `:report --format json` for drift detection could not distinguish "set to default" from "never set" - after a `:set --global` followed by an unset, the JSON still reported the default value. The `<plugin>-global-<property>` keys now hold the raw stored value (empty when nothing has been set) and `<plugin>-computed-<property>` keys hold the effective value with per-app, global, and built-in default fallback. Every global property now has a computed sibling for shape consistency, including those whose default is empty. Internal callers in `scheduler-k3s` that previously read the default-applied global helpers now consume new `getComputed*` helpers, keeping deploy-time behavior unchanged.
The nginx-property binary's globalValue() switch returned ComputedX for
client-body-timeout, client-header-timeout, keepalive-timeout, and
lingering-timeout, leaking the per-app value into nginx:report's
global-<prop> key. Other properties in the same switch already call
GlobalX. Aligns the four with the rest. Also tightens
tests/unit/nginx-vhosts_properties.bats so the helper preserves values
containing whitespace or literal \$ across the inner /bin/bash -c, and
switches proxy-keepalive to integer values since the set subcommand
validates it via is_number.
