Fix trailing slash in resources/read URI handling

Strip trailing slashes from resource URIs for compatibility with Python
fastmcp client which may append trailing slashes to URIs.

Author: 0xeb

src/mcp/handler.cpp

@@ -710,6 +710,9 @@ make_mcp_handler(const std::string& server_name, const std::string& version,
                 std::string uri = params.value("uri", "");
                 if (uri.empty())
                     return jsonrpc_error(id, -32602, "Missing resource URI");
+                // Strip trailing slashes for compatibility with Python fastmcp
+                while (!uri.empty() && uri.back() == '/')
+                    uri.pop_back();
                 try
                 {
                     auto content = resources.read(uri, params);