Per-tracker seeding rules and torrent reaper (#88)

crates/arr-e2e/tests/e2e.rs

@@ -162,6 +162,44 @@ async fn transmission_add_list_and_remove() {
     assert!(torrents.iter().all(|torrent| torrent.id != second.id));
 }
 
+/// Transmission, not arr's import state, owns the done-seeding boundary. The
+/// real service must report an unfinished torrent before its seed limit clears.
+#[tokio::test]
+async fn transmission_reports_done_only_after_its_seed_limit() {
+    let client = TransmissionClient::new(&transmission_url()).expect("valid endpoint");
+    let name = format!("arr-e2e-reaper-{}", uuid::Uuid::new_v4());
+    let download_dir = PathBuf::from("/tmp/arr-e2e");
+    let metainfo = torrent_with_name(&name);
+    let request = |ratio| AddTorrent {
+        source: TorrentSource::Metainfo(metainfo.clone()),
+        label: "movies-main".into(),
+        download_dir: download_dir.clone(),
+        seed_ratio_limit: ratio,
+        seed_idle_limit_minutes: 60,
+    };
+    let added = client
+        .add_torrent(request(100.0))
+        .await
+        .expect("add torrent");
+
+    let before = client
+        .list_torrents()
+        .await
+        .expect("list before limit")
+        .into_iter()
+        .find(|torrent| torrent.id == added.id)
+        .expect("torrent before limit");
+    assert!(
+        !before.is_finished,
+        "the reaper must leave this torrent alone"
+    );
+
+    client
+        .remove_torrent(added.id, true)
+        .await
+        .expect("cleanup");
+}
+
 fn torrent_with_name(name: &str) -> Vec<u8> {
     let piece_hash = [0_u8; 20];
     let mut bytes = format!("d4:infod6:lengthi1e4:name{}:{name}", name.len()).into_bytes();