Add podcast show metadata regression coverage

- Verify description, genres, and language are returned by show detail.

Author: srow90

src/api/tests/test_fork_podcast.py

@@ -28,6 +28,9 @@ def setUp(self):
             podcast_uuid="show-uuid-1",
             title="Test Show",
             image="https://example.com/show.jpg",
+            description="A test podcast description.",
+            genres=["Technology", "News"],
+            language="en",
         )
         self.episode1 = PodcastEpisode.objects.create(
             show=self.show,
@@ -48,6 +51,21 @@ def setUp(self):
 class ShowTrackerTests(PodcastApiTestCase):
     """Show tracker CRUD."""
 
+    def test_detail_includes_show_metadata(self):
+        """Show detail exposes the stored discovery metadata."""
+        response = self.call_api(
+            "get",
+            "api_podcast_show_detail",
+            args=(self.show.id,),
+            headers=self.auth_headers,
+        )
+
+        self.assertEqual(response.status_code, HTTP.OK)
+        payload = response.json()
+        self.assertEqual(payload["description"], "A test podcast description.")
+        self.assertEqual(payload["genres"], ["Technology", "News"])
+        self.assertEqual(payload["language"], "en")
+
     def test_track_list_patch_delete(self):
         """Full tracker lifecycle."""
         created = self.call_api(