Fix package name to @nimblebraininc/postgres

Author: mgoldsborough

manifest.json

@@ -1,7 +1,7 @@
 {
   "manifest_version": "0.3",
-  "name": "ai.nimbletools/postgres",
-  "version": "0.3.1-mcpb.3",
+  "name": "@nimblebraininc/postgres",
+  "version": "0.3.1-mcpb.4",
   "description": "PostgreSQL MCP server with AI-powered tuning, index optimization, and database health analysis",
   "author": {
     "name": "Crystal DBA (packaged by NimbleBrain Inc)"