Update version to 0.5.1 (MWG-Logan#40)

* Update server version to 0.5.1 in host.json

* Delete CHANGELOG.md

Author: MWG-Logan

CHANGELOG.md

@@ -4,10 +4,10 @@
     "mcp": {
       "instructions": "This server offers LLMs long-term memory storage capabilities about users, projects, and anything else needed. This should not entirely replace using public information tooling like Microsoft Docs or Context7.",
       "serverName": "Central Memory MCP",
-      "serverVersion": "1.0.0",  
+      "serverVersion": "0.5.1",  
       "system": {
         "webhookAuthorizationLevel": "System"
       }
     }
   }
-}
+}