WP-10: OS and package inventory

Debian inspector (dpkg-query, apt-get -s upgrade, snap list, os-release,
reboot-required) behind a CommandRunner port with tested parsers, fake
inspector for dev, persisted inventory snapshot, package_refresh job,
/api/system/inventory, Updates page with OS card, summary and filterable
package table.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

backend/crates/api/src/openapi.rs

@@ -26,6 +26,7 @@ impl Modify for BearerAuth {
         crate::users::list, crate::users::create, crate::users::get_one, crate::users::update, crate::users::reset_password,
         crate::settings::get_smtp, crate::settings::put_smtp, crate::settings::test_smtp, crate::settings::list_schedules, crate::settings::put_schedule,
         crate::jobs::list, crate::jobs::kinds, crate::jobs::get_one, crate::jobs::run,
+        crate::system::inventory,
     ),
     modifiers(&BearerAuth)
 )]