feat: provide more context information (#236)

* feat: provide more context information

1. provide context for notification
2. allow extract more info from tool call
3. inject http request part for streamable http server

* docs: add document for getting peer from context

crates/rmcp/tests/common/handlers.rs

@@ -4,8 +4,9 @@ use std::{
 };
 
 use rmcp::{
-    ClientHandler, Error as McpError, RoleClient, RoleServer, ServerHandler, model::*,
-    service::RequestContext,
+    ClientHandler, Error as McpError, RoleClient, RoleServer, ServerHandler,
+    model::*,
+    service::{NotificationContext, RequestContext},
 };
 use serde_json::json;
 use tokio::sync::Notify;
@@ -83,6 +84,7 @@ impl ClientHandler for TestClientHandler {
     fn on_logging_message(
         &self,
         params: LoggingMessageNotificationParam,
+        _context: NotificationContext<RoleClient>,
     ) -> impl Future<Output = ()> + Send + '_ {
         let receive_signal = self.receive_signal.clone();
         let received_messages = self.received_messages.clone();

crates/rmcp/tests/test_notification.rs

@@ -52,7 +52,11 @@ pub struct Client {
 }
 
 impl ClientHandler for Client {
-    async fn on_resource_updated(&self, params: rmcp::model::ResourceUpdatedNotificationParam) {
+    async fn on_resource_updated(
+        &self,
+        params: rmcp::model::ResourceUpdatedNotificationParam,
+        _context: rmcp::service::NotificationContext<rmcp::RoleClient>,
+    ) {
         let uri = params.uri;
         tracing::info!("Resource updated: {}", uri);
         self.receive_signal.notify_one();