Add data-engineering to marketplace

.claude-plugin/marketplace.json

@@ -1040,16 +1040,14 @@
       "homepage": "https://github.com/intercom/claude-plugin-external"
     },
     {
-      "name": "helius",
-      "description": "Build on Solana with Helius — live blockchain tools, expert coding patterns, and autonomous account signup",
+      "name": "data-engineering",
+      "description": "Data engineering plugin - warehouse exploration, pipeline authoring, Airflow integration",
       "source": {
-        "source": "git-subdir",
-        "url": "helius-labs/core-ai",
-        "path": "helius-plugin",
-        "ref": "main",
-        "sha": "05ea4d1128d46618266bbcc23a5e7019c57be0d6"
+        "source": "url",
+        "url": "https://github.com/astronomer/agents.git",
+        "sha": "85d6053b1e21724f9cefb1e3f5219bd54fc77224"
       },
-      "homepage": "https://www.helius.dev/docs"
+      "homepage": "https://github.com/astronomer/agents"
     }
   ]
 }