Return full avatar URLs instead of digests in stats

- Replace digest_sha256 with avatar_url in top_viewed_avatars
- Replace digest_sha256 with avatar_url in top_queried_emails
- Replace digest_sha256 with avatar_url in top_queried_openids
- All avatar URLs now use https://libravatar.org/avatar/{digest} format
- Update tests to verify avatar_url presence and correct format
- All 5 stats tests pass successfully

This makes the stats API more user-friendly by providing complete
avatar URLs that can be directly used in applications instead of
requiring clients to construct the URLs themselves.

ivatar/test_views_stats.py

@@ -160,6 +160,14 @@ class StatsTester(TestCase):
             100,
             "top avatar access count incorrect",
         )
+        # Check that avatar_url is present and starts with the correct base URL
+        self.assertIn("avatar_url", j["top_viewed_avatars"][0], "avatar_url missing")
+        self.assertTrue(
+            j["top_viewed_avatars"][0]["avatar_url"].startswith(
+                "https://libravatar.org/avatar/"
+            ),
+            "avatar_url should start with https://libravatar.org/avatar/",
+        )
 
         # Test top queried emails
         self.assertIn("top_queried_emails", j, "top_queried_emails missing")
@@ -171,6 +179,14 @@ class StatsTester(TestCase):
             100,
             "top email access count incorrect",
         )
+        # Check that avatar_url is present and starts with the correct base URL
+        self.assertIn("avatar_url", j["top_queried_emails"][0], "avatar_url missing")
+        self.assertTrue(
+            j["top_queried_emails"][0]["avatar_url"].startswith(
+                "https://libravatar.org/avatar/"
+            ),
+            "avatar_url should start with https://libravatar.org/avatar/",
+        )
 
         # Test top queried openids
         self.assertIn("top_queried_openids", j, "top_queried_openids missing")
@@ -182,6 +198,14 @@ class StatsTester(TestCase):
             75,
             "top openid access count incorrect",
         )
+        # Check that avatar_url is present and starts with the correct base URL
+        self.assertIn("avatar_url", j["top_queried_openids"][0], "avatar_url missing")
+        self.assertTrue(
+            j["top_queried_openids"][0]["avatar_url"].startswith(
+                "https://libravatar.org/avatar/"
+            ),
+            "avatar_url should start with https://libravatar.org/avatar/",
+        )
 
         # Test photo format distribution
         self.assertIn(

ivatar/views.py

@@ -589,7 +589,7 @@ class StatsView(TemplateView, JsonResponse):
                     top_photos_data.append(
                         {
                             "access_count": top_associated.access_count,
-                            "digest_sha256": top_associated.digest_sha256,
+                            "avatar_url": f"https://libravatar.org/avatar/{top_associated.digest_sha256}",
                         }
                     )
                 else:
@@ -597,7 +597,7 @@ class StatsView(TemplateView, JsonResponse):
                     top_photos_data.append(
                         {
                             "access_count": top_associated.access_count,
-                            "digest_sha256": top_associated.digest,
+                            "avatar_url": f"https://libravatar.org/avatar/{top_associated.digest}",
                         }
                     )
 
@@ -610,7 +610,7 @@ class StatsView(TemplateView, JsonResponse):
             top_emails_data.append(
                 {
                     "access_count": email.access_count,
-                    "digest_sha256": email.digest_sha256,
+                    "avatar_url": f"https://libravatar.org/avatar/{email.digest_sha256}",
                 }
             )
 
@@ -623,7 +623,7 @@ class StatsView(TemplateView, JsonResponse):
             top_openids_data.append(
                 {
                     "access_count": openid.access_count,
-                    "digest_sha256": openid.digest,
+                    "avatar_url": f"https://libravatar.org/avatar/{openid.digest}",
                 }
             )