Edge Construction Module

[anson-zhou]

Build an edge construction module aligned with protocol requirements:

• Define transitions (edges) clearly, including event type, confidence, ordinal steps, and branching logic.
• Include at minimum edge ID, source node, target node, and functions to retrieve associated data.
• Manage different transition types: Intervention, Observation, Spontaneous Change, Reinterpretation.
• Ensure accurate temporal ordering of edges.