fix: release cooldown on local media failures

tests/test_media_cli.py

@@ -2,7 +2,7 @@ import json
 from pathlib import Path
 
 from rf4_research import media_cli
-from rf4_research.media_cli import _download_batch, media_queue_plan
+from rf4_research.media_cli import _download_batch, _download_one, media_queue_plan
 
 
 def test_queue_plan_prioritizes_entity_gaps_and_respects_domain_cooldown(tmp_path: Path) -> None:
@@ -101,3 +101,22 @@ def test_batch_downloads_quality_upgrade_without_unpublishing_fallback(tmp_path:
     assert report["stored_total"] == 1
     assets = json.loads((root / "manifest.json").read_text(encoding="utf-8"))["assets"]
     assert assets[0]["status"] == "upgrade_stored"
+
+
+def test_local_failure_releases_media_reservation(tmp_path: Path, monkeypatch) -> None:
+    root = tmp_path / "media"
+    root.mkdir()
+    (root / "manifest.json").write_text(json.dumps({"version": 1, "assets": [
+        {"status": "queued", "asset_url": "https://rf4map.ru/fish.png"},
+    ]}), encoding="utf-8")
+    state = tmp_path / "state.json"
+    monkeypatch.setattr(media_cli, "_attempt_asset", lambda *_: ("queued", OSError("DNS unavailable")))
+
+    try:
+        _download_one(root, state, "https://rf4map.ru/fish.png")
+    except OSError:
+        pass
+    else:
+        raise AssertionError("local media failure must be raised")
+
+    assert not state.exists() or "rf4map.ru" not in json.loads(state.read_text(encoding="utf-8"))