Merge PR #700: add-plugin/data-engineering into staging

.claude-plugin/marketplace.json

@@ -1128,6 +1128,16 @@
         "sha": "593e0553fc9fd94db52386ada2c9e2074a6ecf89"
       },
       "homepage": "https://docs.voxel51.com/"
+    },
+    {
+      "name": "data-engineering",
+      "description": "Data engineering plugin - warehouse exploration, pipeline authoring, Airflow integration",
+      "source": {
+        "source": "url",
+        "url": "https://github.com/astronomer/agents.git",
+        "sha": "85d6053b1e21724f9cefb1e3f5219bd54fc77224"
+      },
+      "homepage": "https://github.com/astronomer/agents"
     }
   ]
 }