The `ps` and `cron` plugins emitted `:report --format json` keys that
skipped the `<plugin>-` prefix or `-global-` infix used by every other
plugin, forcing external consumers to special-case those names. Rename
the affected report flags so they match the `<plugin>-global-<property>`
and `<plugin>-computed-<property>` convention introduced in 0.38.0, and
add the previously missing `computed-` siblings to both the per-app and
`--global` reports so the shape lines up with caddy, haproxy, and
traefik.
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