fix: add tool_info schema discovery for WASM tools (#1086)

* fix: add tool_info schema discovery for WASM tools

* refactor: simplify WASM schema and hint state

* refactor: store tool_info registry reference as Weak

src/app.rs

@@ -290,6 +290,7 @@ impl AppBuilder {
             Arc::new(ToolRegistry::new())
         };
         tools.register_builtin_tools();
+        tools.register_tool_info();
 
         if let Some(ref ss) = self.secrets_store {
             tools.register_secrets_tools(Arc::clone(ss));