fix: code references count returns 0 after unchanged rescan (#7599)

Author: Zaimwa9

api/projects/code_references/services.py

@@ -146,7 +146,9 @@ def record_scan(
             for feature_name, references in references_by_feature.items()
             if (feature := features_by_name.get(feature_name)) is not None
         ],
-        ignore_conflicts=True,
+        update_conflicts=True,
+        unique_fields=["feature", "repository", "code_references_hash"],
+        update_fields=["created_at", "revision"],
     )
 
     return FeatureFlagCodeReferencesScan(

api/tests/unit/projects/code_references/test_unit_projects_code_references_views.py

@@ -188,12 +188,13 @@ def test_create_code_reference__file_path_too_long__returns_400(
     assert not ScannedCodeReferences.objects.exists()
 
 
-def test_create_code_reference__duplicate_payload__deduplicates_storage(
+@freezegun.freeze_time("2099-06-01T12:00:00+00:00")
+def test_create_code_reference__duplicate_payload__deduplicates_storage_and_references_remain_retrievable(
     admin_client_new: APIClient,
     project: Project,
 ) -> None:
     # Given
-    Feature.objects.create(project=project, name="feature-1")
+    feature = Feature.objects.create(project=project, name="feature-1")
     payload = {
         "repository_url": "https://github.flagsmith.com/",
         "revision": "rev-1",
@@ -205,17 +206,38 @@ def test_create_code_reference__duplicate_payload__deduplicates_storage(
             },
         ],
     }
-
-    # When
     admin_client_new.post(
         f"/api/v1/projects/{project.pk}/code-references/", data=payload, format="json"
     )
+
+    # When
     admin_client_new.post(
         f"/api/v1/projects/{project.pk}/code-references/", data=payload, format="json"
     )
 
     # Then
     assert ScannedCodeReferences.objects.count() == 1
+    response = admin_client_new.get(
+        f"/api/v1/projects/{project.pk}/features/{feature.pk}/code-references/",
+    )
+    assert response.status_code == 200
+    assert response.json() == [
+        {
+            "repository_url": "https://github.flagsmith.com/",
+            "vcs_provider": "github",
+            "revision": "rev-1",
+            "last_successful_repository_scanned_at": "2099-06-01T12:00:00+00:00",
+            "last_feature_found_at": "2099-06-01T12:00:00+00:00",
+            "code_references": [
+                {
+                    "feature_name": "feature-1",
+                    "file_path": "path/to/file.py",
+                    "line_number": 1,
+                    "permalink": "https://github.flagsmith.com/blob/rev-1/path/to/file.py#L1",
+                },
+            ],
+        },
+    ]
 
 
 def test_get_feature_code_references__multiple_scans_exist__returns_latest_per_repository(