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/tests/jobs.rs

@@ -31,10 +31,7 @@ async fn admin_runs_a_job_and_sees_it_in_the_list_with_log() {
         let run = get(&app, &format!("/api/jobs/{id}"), Some(&token)).await;
         status = run.json["status"].as_str().unwrap().to_string();
         if status != "running" {
-            assert!(run.json["log"]
-                .as_str()
-                .unwrap()
-                .contains("test handler ran"));
+            assert!(run.json["log"].as_str().unwrap().contains("packages"));
             break;
         }
         tokio::time::sleep(std::time::Duration::from_millis(20)).await;