Page the version name sweep with a resume cursor (#194)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/versions/integration_tests.rs

@@ -253,6 +253,46 @@ async fn name_link_pairs_raw_and_jpeg_with_the_right_original() {
     );
 }
 
+#[actix_rt::test]
+async fn unresolvable_name_candidates_do_not_starve_later_ones() {
+    let fx = fx();
+    // Many matching rows with no original anywhere, then one linkable pair.
+    for i in 0..120 {
+        fx.put(
+            &format!("album_a/aiedits/orphan{i}.jpg.edit.png"),
+            format!("orphan {i}").as_bytes(),
+        );
+    }
+    let original = fx.put("album_b/real.jpg", b"real original");
+    let version = fx.put("album_b/aiedits/real.jpg.restored.png", b"real version");
+
+    let exif = fx.exif_arc();
+    let mut cursor = 0;
+    let mut total = 0;
+    // One 50-row page per call: the old "ORDER BY id LIMIT n" would return
+    // the same 50 orphans forever.
+    for _ in 0..5 {
+        total += sweep_name_links_from(
+            &fx.library,
+            &exif,
+            &fx.state.version_dao,
+            &mut cursor,
+            50,
+            1,
+        );
+    }
+    assert_eq!(total, 1);
+    let link = fx
+        .state
+        .version_dao
+        .lock()
+        .unwrap()
+        .get_link(&version)
+        .unwrap()
+        .unwrap();
+    assert_eq!(link.original_hash, original);
+}
+
 #[actix_rt::test]
 async fn name_link_waits_for_the_original_to_be_hashed() {
     let fx = fx();