fix(catalog): add missing metadataType values in test catalog YAML (#1634)

Add metadataType field to customProperties in test-yaml-catalog.yaml
to ensure proper metadata type specification for test data.

🤖 Generated with [Claude Code](https://claude.ai/code)

Signed-off-by: Chris Hambridge <chambrid@redhat.com>
Co-authored-by: Claude <noreply@anthropic.com>

.gitignore

@@ -56,3 +56,7 @@ istio-*
 # Python
 venv/
 .python-version
+
+# Claude code
+CLAUDE.md
+.claude/

catalog/internal/catalog/testdata/test-yaml-catalog.yaml

@@ -673,8 +673,10 @@ models:
         customProperties:
           foo:
             string_value: bar
+            metadataType: MetadataStringValue
           baz:
             string_value: qux
+            metadataType: MetadataStringValue
   - name: model-with-no-artifacts
     provider: Test
     description: A model used for testing the GetArtifacts method when no artifacts are present.