fix(monitoring): return array from /version endpoint for Grafana Infinity

Grafana Infinity datasource expects JSON array format for table queries.
Changed response from single object to array with one object.

Author: claude

monitoring_flask_backend/app.py

@@ -53,11 +53,11 @@ def read_version_file(filepath, default='unknown'):
 
 @app.route('/version', methods=['GET'])
 def version():
-    """Return application version and build timestamp"""
-    return jsonify({
+    """Return application version and build timestamp as array for Grafana Infinity datasource"""
+    return jsonify([{
         "version": APP_VERSION,
         "build_ts": APP_BUILD_TS
-    })
+    }])
 
 
 @app.route('/health', methods=['GET'])

monitoring_flask_backend/test_app.py

@@ -23,17 +23,24 @@ def test_version_endpoint_returns_json(self, client):
         assert response.status_code == 200
         assert response.content_type == 'application/json'
 
+    def test_version_endpoint_returns_array(self, client):
+        """Test that /version returns array for Grafana Infinity datasource."""
+        response = client.get('/version')
+        data = json.loads(response.data)
+        assert isinstance(data, list)
+        assert len(data) == 1
+
     def test_version_endpoint_contains_version_field(self, client):
         """Test that /version response contains version field."""
         response = client.get('/version')
         data = json.loads(response.data)
-        assert 'version' in data
+        assert 'version' in data[0]
 
     def test_version_endpoint_contains_build_ts_field(self, client):
         """Test that /version response contains build_ts field."""
         response = client.get('/version')
         data = json.loads(response.data)
-        assert 'build_ts' in data
+        assert 'build_ts' in data[0]
 
 
 class TestReadVersionFile: