Fix tests for tag removal and version behavior

- Fix upload response to return actual version (not requested version)
  when artifact already has a version in the package
- Update ref_count tests to use multiple packages (one version per
  artifact per package design constraint)
- Remove allow_public_internet references from upstream caching tests
- Update consistency check test to not assert global system health
- Add versions field to artifact schemas
- Fix dependencies resolution to handle removed tag constraint

backend/tests/test_dependencies.py

@@ -405,7 +405,6 @@ class TestDependencyQueryEndpoints:
             for dep in data["dependents"]:
                 if dep["project"] == project_name:
                     found = True
-                    assert dep["constraint_type"] == "version"
                     assert dep["constraint_value"] == "1.0.0"
                     break
             assert found, "Our package should be in the dependents list"
@@ -690,11 +689,15 @@ class TestDependencyResolution:
         # OR succeed at upload but fail at resolution
         # Depending on implementation choice
         if response.status_code == 200:
-            # Resolution should fail
+            # Resolution should return missing dependencies
             response = integration_client.get(
                 f"/api/v1/project/{project_name}/{package_name}/+/missing-dep-{unique_test_id}/resolve"
             )
-            assert response.status_code == 404
+            # Expect 200 with missing dependencies listed
+            assert response.status_code == 200
+            data = response.json()
+            # The missing dependency should be in the 'missing' list
+            assert len(data.get("missing", [])) >= 1
 
 
 class TestCircularDependencyDetection: