Clarify Sonarr search download behavior

dev/test_sonarr_release_grab.py

@@ -74,6 +74,35 @@ class ReleaseGrabTests(unittest.IsolatedAsyncioTestCase):
                 {"series_id": 42, "season_number": 7, "guid": "different-guid"},
             )
 
+    async def test_search_can_limit_results_to_group_and_season_pack(self) -> None:
+        client = FakeSonarrClient()
+        client.get_release = lambda **_kwargs: [
+            dict(client.release),
+            {
+                **client.release,
+                "guid": "episode-guid",
+                "title": "Mord.ist.ihr.Hobby.S07E02.German.1080p-FuN",
+                "fullSeason": False,
+            },
+            {
+                **client.release,
+                "guid": "other-group",
+                "title": "Mord.ist.ihr.Hobby.S07.German.1080p-HQC",
+                "releaseGroup": "HQC",
+            },
+        ]
+        result = await mcp_sonarr._search_releases(
+            client,
+            {
+                "series_id": 42,
+                "season_number": 7,
+                "release_group": "FuN",
+                "season_pack_only": True,
+            },
+        )
+        self.assertEqual(result["results"]["total"], 1)
+        self.assertEqual(result["results"]["items"][0]["guid"], "exact-guid")
+
 
 if __name__ == "__main__":
     unittest.main()