Summary

Direct node instantiation now accepts typed *NodeData payloads, but the constructor keyword is still named config. That name no longer matches the value being passed.

Problem

After the node initialization refactor in #38 and PR #39, code such as HttpRequestNode(node_id=..., config=HttpRequestNodeData(...)) treats a typed node data object as config. The type and the keyword point at different concepts:

• node_config is still the outer raw graph payload with {id, data}
• the constructor argument is the inner typed node data payload

This makes direct instantiation less clear, especially in nodes that already have real *_config collaborators such as http_request_config.

Proposed Change

Rename the constructor keyword from config to data for Node.__init__ and the concrete node subclasses that now accept typed node data instances.

Scope

• update Node.__init__ and concrete node subclasses
• update direct instantiation call sites in examples and tests
• keep raw graph boundary types such as NodeConfigDict unchanged

Context

This is a follow-up to #38 and PR #39 rather than a duplicate of them.