GHSA-pc2w-4mq8-32qw: @dynatrace-oss/dynatrace-mcp-server's create_dynatrace_notebook missing the human-approval gate

The `create_dynatrace_notebook` tool in @dynatrace-oss/dynatrace-mcp-server is missing a human-approval gate that should require operator consent before executing. Unlike five other write tools in the same library, this tool allows anyone to create persistent notebooks with arbitrary content (including embedded DQL queries that execute under other users' permissions) without any confirmation from the system operator.