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/app/dependencies.py

@@ -677,7 +677,7 @@ def resolve_dependencies(
     else:
         # Try to find artifact by version
         resolved = _resolve_dependency_to_artifact(
-            db, project_name, package_name, ref, ref
+            db, project_name, package_name, ref
         )
         if not resolved:
             raise DependencyNotFoundError(project_name, package_name, ref)